Sebastian Andrzej Siewior | 88af8bb | 2012-12-23 21:10:24 +0100 | [diff] [blame] | 1 | #include <linux/configfs.h> |
| 2 | #include <linux/module.h> |
| 3 | #include <linux/slab.h> |
| 4 | #include <linux/device.h> |
Andrzej Pietrasiewicz | 87213d3 | 2014-05-08 14:06:25 +0200 | [diff] [blame] | 5 | #include <linux/nls.h> |
Sebastian Andrzej Siewior | 88af8bb | 2012-12-23 21:10:24 +0100 | [diff] [blame] | 6 | #include <linux/usb/composite.h> |
| 7 | #include <linux/usb/gadget_configfs.h> |
Rashika Kheria | 0009e99 | 2013-12-19 15:37:37 +0530 | [diff] [blame] | 8 | #include "configfs.h" |
Andrzej Pietrasiewicz | da42431 | 2014-05-08 14:06:26 +0200 | [diff] [blame] | 9 | #include "u_f.h" |
Andrzej Pietrasiewicz | 7419485 | 2014-05-08 14:06:28 +0200 | [diff] [blame] | 10 | #include "u_os_desc.h" |
Sebastian Andrzej Siewior | 88af8bb | 2012-12-23 21:10:24 +0100 | [diff] [blame] | 11 | |
Badhri Jagan Sridharan | 1c3865d | 2014-12-15 10:44:47 -0800 | [diff] [blame] | 12 | #ifdef CONFIG_USB_CONFIGFS_UEVENT |
| 13 | #include <linux/platform_device.h> |
| 14 | #include <linux/kdev_t.h> |
| 15 | #include <linux/usb/ch9.h> |
Badhri Jagan Sridharan | 1c3865d | 2014-12-15 10:44:47 -0800 | [diff] [blame] | 16 | |
Ziqi Chen | c35ae88 | 2017-09-26 18:48:28 +0800 | [diff] [blame] | 17 | #ifdef CONFIG_USB_F_NCM |
| 18 | #include <function/u_ncm.h> |
| 19 | #endif |
| 20 | |
Badhri Jagan Sridharan | 1c3865d | 2014-12-15 10:44:47 -0800 | [diff] [blame] | 21 | #ifdef CONFIG_USB_CONFIGFS_F_ACC |
| 22 | extern int acc_ctrlrequest(struct usb_composite_dev *cdev, |
| 23 | const struct usb_ctrlrequest *ctrl); |
| 24 | void acc_disconnect(void); |
| 25 | #endif |
Ziqi Chen | c35ae88 | 2017-09-26 18:48:28 +0800 | [diff] [blame] | 26 | |
Badhri Jagan Sridharan | 1c3865d | 2014-12-15 10:44:47 -0800 | [diff] [blame] | 27 | static struct class *android_class; |
Badhri Jagan Sridharan | 2a387e5 | 2015-03-27 14:15:19 -0700 | [diff] [blame] | 28 | static struct device *android_device; |
| 29 | static int index; |
Ajay Agarwal | fea56da | 2017-05-30 10:27:23 +0530 | [diff] [blame] | 30 | static int gadget_index; |
Badhri Jagan Sridharan | 2a387e5 | 2015-03-27 14:15:19 -0700 | [diff] [blame] | 31 | |
| 32 | struct device *create_function_device(char *name) |
| 33 | { |
| 34 | if (android_device && !IS_ERR(android_device)) |
| 35 | return device_create(android_class, android_device, |
| 36 | MKDEV(0, index++), NULL, name); |
| 37 | else |
| 38 | return ERR_PTR(-EINVAL); |
| 39 | } |
| 40 | EXPORT_SYMBOL_GPL(create_function_device); |
Badhri Jagan Sridharan | 1c3865d | 2014-12-15 10:44:47 -0800 | [diff] [blame] | 41 | #endif |
| 42 | |
Sebastian Andrzej Siewior | 88af8bb | 2012-12-23 21:10:24 +0100 | [diff] [blame] | 43 | int check_user_usb_string(const char *name, |
| 44 | struct usb_gadget_strings *stringtab_dev) |
| 45 | { |
| 46 | unsigned primary_lang; |
| 47 | unsigned sub_lang; |
| 48 | u16 num; |
| 49 | int ret; |
| 50 | |
| 51 | ret = kstrtou16(name, 0, &num); |
| 52 | if (ret) |
| 53 | return ret; |
| 54 | |
| 55 | primary_lang = num & 0x3ff; |
| 56 | sub_lang = num >> 10; |
| 57 | |
| 58 | /* simple sanity check for valid langid */ |
| 59 | switch (primary_lang) { |
| 60 | case 0: |
| 61 | case 0x62 ... 0xfe: |
| 62 | case 0x100 ... 0x3ff: |
| 63 | return -EINVAL; |
| 64 | } |
| 65 | if (!sub_lang) |
| 66 | return -EINVAL; |
| 67 | |
| 68 | stringtab_dev->language = num; |
| 69 | return 0; |
| 70 | } |
| 71 | |
| 72 | #define MAX_NAME_LEN 40 |
| 73 | #define MAX_USB_STRING_LANGS 2 |
| 74 | |
Li Jun | 41ce84c | 2015-07-09 15:18:48 +0800 | [diff] [blame] | 75 | static const struct usb_descriptor_header *otg_desc[2]; |
| 76 | |
Sebastian Andrzej Siewior | 88af8bb | 2012-12-23 21:10:24 +0100 | [diff] [blame] | 77 | struct gadget_info { |
| 78 | struct config_group group; |
| 79 | struct config_group functions_group; |
| 80 | struct config_group configs_group; |
| 81 | struct config_group strings_group; |
Andrzej Pietrasiewicz | 87213d3 | 2014-05-08 14:06:25 +0200 | [diff] [blame] | 82 | struct config_group os_desc_group; |
Sebastian Andrzej Siewior | 88af8bb | 2012-12-23 21:10:24 +0100 | [diff] [blame] | 83 | |
| 84 | struct mutex lock; |
| 85 | struct usb_gadget_strings *gstrings[MAX_USB_STRING_LANGS + 1]; |
| 86 | struct list_head string_list; |
| 87 | struct list_head available_func; |
| 88 | |
Sebastian Andrzej Siewior | 88af8bb | 2012-12-23 21:10:24 +0100 | [diff] [blame] | 89 | struct usb_composite_driver composite; |
| 90 | struct usb_composite_dev cdev; |
Andrzej Pietrasiewicz | 87213d3 | 2014-05-08 14:06:25 +0200 | [diff] [blame] | 91 | bool use_os_desc; |
Vijayavardhan Vennapusa | 4ca835b | 2017-10-30 14:33:51 +0530 | [diff] [blame] | 92 | bool unbinding; |
Andrzej Pietrasiewicz | 87213d3 | 2014-05-08 14:06:25 +0200 | [diff] [blame] | 93 | char b_vendor_code; |
| 94 | char qw_sign[OS_STRING_QW_SIGN_LEN]; |
Peter Chen | aa919ef | 2019-08-26 15:10:55 -0400 | [diff] [blame] | 95 | spinlock_t spinlock; |
| 96 | bool unbind; |
Badhri Jagan Sridharan | 1c3865d | 2014-12-15 10:44:47 -0800 | [diff] [blame] | 97 | #ifdef CONFIG_USB_CONFIGFS_UEVENT |
| 98 | bool connected; |
| 99 | bool sw_connected; |
| 100 | struct work_struct work; |
| 101 | struct device *dev; |
| 102 | #endif |
Sebastian Andrzej Siewior | 88af8bb | 2012-12-23 21:10:24 +0100 | [diff] [blame] | 103 | }; |
| 104 | |
Christoph Hellwig | 45b6a73 | 2015-10-03 15:32:38 +0200 | [diff] [blame] | 105 | static inline struct gadget_info *to_gadget_info(struct config_item *item) |
| 106 | { |
| 107 | return container_of(to_config_group(item), struct gadget_info, group); |
| 108 | } |
| 109 | |
Sebastian Andrzej Siewior | 88af8bb | 2012-12-23 21:10:24 +0100 | [diff] [blame] | 110 | struct config_usb_cfg { |
| 111 | struct config_group group; |
| 112 | struct config_group strings_group; |
Sebastian Andrzej Siewior | 88af8bb | 2012-12-23 21:10:24 +0100 | [diff] [blame] | 113 | struct list_head string_list; |
| 114 | struct usb_configuration c; |
| 115 | struct list_head func_list; |
| 116 | struct usb_gadget_strings *gstrings[MAX_USB_STRING_LANGS + 1]; |
| 117 | }; |
| 118 | |
Christoph Hellwig | 45b6a73 | 2015-10-03 15:32:38 +0200 | [diff] [blame] | 119 | static inline struct config_usb_cfg *to_config_usb_cfg(struct config_item *item) |
| 120 | { |
| 121 | return container_of(to_config_group(item), struct config_usb_cfg, |
| 122 | group); |
| 123 | } |
| 124 | |
Sebastian Andrzej Siewior | 88af8bb | 2012-12-23 21:10:24 +0100 | [diff] [blame] | 125 | struct gadget_strings { |
| 126 | struct usb_gadget_strings stringtab_dev; |
| 127 | struct usb_string strings[USB_GADGET_FIRST_AVAIL_IDX]; |
| 128 | char *manufacturer; |
| 129 | char *product; |
| 130 | char *serialnumber; |
| 131 | |
| 132 | struct config_group group; |
| 133 | struct list_head list; |
| 134 | }; |
| 135 | |
Andrzej Pietrasiewicz | 87213d3 | 2014-05-08 14:06:25 +0200 | [diff] [blame] | 136 | struct os_desc { |
| 137 | struct config_group group; |
| 138 | }; |
| 139 | |
Sebastian Andrzej Siewior | 88af8bb | 2012-12-23 21:10:24 +0100 | [diff] [blame] | 140 | struct gadget_config_name { |
| 141 | struct usb_gadget_strings stringtab_dev; |
| 142 | struct usb_string strings; |
| 143 | char *configuration; |
| 144 | |
| 145 | struct config_group group; |
| 146 | struct list_head list; |
| 147 | }; |
| 148 | |
Jim Lin | 240e2d0 | 2017-01-13 16:07:58 +0800 | [diff] [blame] | 149 | #define MAX_USB_STRING_LEN 126 |
| 150 | #define MAX_USB_STRING_WITH_NULL_LEN (MAX_USB_STRING_LEN+1) |
| 151 | |
Sebastian Andrzej Siewior | 88af8bb | 2012-12-23 21:10:24 +0100 | [diff] [blame] | 152 | static int usb_string_copy(const char *s, char **s_copy) |
| 153 | { |
| 154 | int ret; |
| 155 | char *str; |
| 156 | char *copy = *s_copy; |
| 157 | ret = strlen(s); |
Jim Lin | 240e2d0 | 2017-01-13 16:07:58 +0800 | [diff] [blame] | 158 | if (ret > MAX_USB_STRING_LEN) |
Sebastian Andrzej Siewior | 88af8bb | 2012-12-23 21:10:24 +0100 | [diff] [blame] | 159 | return -EOVERFLOW; |
| 160 | |
Jim Lin | 240e2d0 | 2017-01-13 16:07:58 +0800 | [diff] [blame] | 161 | if (copy) { |
| 162 | str = copy; |
| 163 | } else { |
| 164 | str = kmalloc(MAX_USB_STRING_WITH_NULL_LEN, GFP_KERNEL); |
| 165 | if (!str) |
| 166 | return -ENOMEM; |
| 167 | } |
Manu Gautam | 7fffcd4 | 2017-03-28 11:28:24 +0530 | [diff] [blame] | 168 | strlcpy(str, s, MAX_USB_STRING_WITH_NULL_LEN); |
Sebastian Andrzej Siewior | 88af8bb | 2012-12-23 21:10:24 +0100 | [diff] [blame] | 169 | if (str[ret - 1] == '\n') |
| 170 | str[ret - 1] = '\0'; |
Sebastian Andrzej Siewior | 88af8bb | 2012-12-23 21:10:24 +0100 | [diff] [blame] | 171 | *s_copy = str; |
| 172 | return 0; |
| 173 | } |
| 174 | |
Sebastian Andrzej Siewior | 88af8bb | 2012-12-23 21:10:24 +0100 | [diff] [blame] | 175 | #define GI_DEVICE_DESC_SIMPLE_R_u8(__name) \ |
Christoph Hellwig | 45b6a73 | 2015-10-03 15:32:38 +0200 | [diff] [blame] | 176 | static ssize_t gadget_dev_desc_##__name##_show(struct config_item *item, \ |
Sebastian Andrzej Siewior | 88af8bb | 2012-12-23 21:10:24 +0100 | [diff] [blame] | 177 | char *page) \ |
| 178 | { \ |
Christoph Hellwig | 45b6a73 | 2015-10-03 15:32:38 +0200 | [diff] [blame] | 179 | return sprintf(page, "0x%02x\n", \ |
| 180 | to_gadget_info(item)->cdev.desc.__name); \ |
Sebastian Andrzej Siewior | 88af8bb | 2012-12-23 21:10:24 +0100 | [diff] [blame] | 181 | } |
| 182 | |
| 183 | #define GI_DEVICE_DESC_SIMPLE_R_u16(__name) \ |
Christoph Hellwig | 45b6a73 | 2015-10-03 15:32:38 +0200 | [diff] [blame] | 184 | static ssize_t gadget_dev_desc_##__name##_show(struct config_item *item, \ |
Sebastian Andrzej Siewior | 88af8bb | 2012-12-23 21:10:24 +0100 | [diff] [blame] | 185 | char *page) \ |
| 186 | { \ |
Christoph Hellwig | 45b6a73 | 2015-10-03 15:32:38 +0200 | [diff] [blame] | 187 | return sprintf(page, "0x%04x\n", \ |
| 188 | le16_to_cpup(&to_gadget_info(item)->cdev.desc.__name)); \ |
Sebastian Andrzej Siewior | 88af8bb | 2012-12-23 21:10:24 +0100 | [diff] [blame] | 189 | } |
| 190 | |
| 191 | |
| 192 | #define GI_DEVICE_DESC_SIMPLE_W_u8(_name) \ |
Christoph Hellwig | 45b6a73 | 2015-10-03 15:32:38 +0200 | [diff] [blame] | 193 | static ssize_t gadget_dev_desc_##_name##_store(struct config_item *item, \ |
Sebastian Andrzej Siewior | 88af8bb | 2012-12-23 21:10:24 +0100 | [diff] [blame] | 194 | const char *page, size_t len) \ |
| 195 | { \ |
| 196 | u8 val; \ |
| 197 | int ret; \ |
| 198 | ret = kstrtou8(page, 0, &val); \ |
| 199 | if (ret) \ |
| 200 | return ret; \ |
Christoph Hellwig | 45b6a73 | 2015-10-03 15:32:38 +0200 | [diff] [blame] | 201 | to_gadget_info(item)->cdev.desc._name = val; \ |
Sebastian Andrzej Siewior | 88af8bb | 2012-12-23 21:10:24 +0100 | [diff] [blame] | 202 | return len; \ |
| 203 | } |
| 204 | |
| 205 | #define GI_DEVICE_DESC_SIMPLE_W_u16(_name) \ |
Christoph Hellwig | 45b6a73 | 2015-10-03 15:32:38 +0200 | [diff] [blame] | 206 | static ssize_t gadget_dev_desc_##_name##_store(struct config_item *item, \ |
Sebastian Andrzej Siewior | 88af8bb | 2012-12-23 21:10:24 +0100 | [diff] [blame] | 207 | const char *page, size_t len) \ |
| 208 | { \ |
| 209 | u16 val; \ |
| 210 | int ret; \ |
| 211 | ret = kstrtou16(page, 0, &val); \ |
| 212 | if (ret) \ |
| 213 | return ret; \ |
Christoph Hellwig | 45b6a73 | 2015-10-03 15:32:38 +0200 | [diff] [blame] | 214 | to_gadget_info(item)->cdev.desc._name = cpu_to_le16p(&val); \ |
Sebastian Andrzej Siewior | 88af8bb | 2012-12-23 21:10:24 +0100 | [diff] [blame] | 215 | return len; \ |
| 216 | } |
| 217 | |
| 218 | #define GI_DEVICE_DESC_SIMPLE_RW(_name, _type) \ |
| 219 | GI_DEVICE_DESC_SIMPLE_R_##_type(_name) \ |
| 220 | GI_DEVICE_DESC_SIMPLE_W_##_type(_name) |
| 221 | |
| 222 | GI_DEVICE_DESC_SIMPLE_R_u16(bcdUSB); |
| 223 | GI_DEVICE_DESC_SIMPLE_RW(bDeviceClass, u8); |
| 224 | GI_DEVICE_DESC_SIMPLE_RW(bDeviceSubClass, u8); |
| 225 | GI_DEVICE_DESC_SIMPLE_RW(bDeviceProtocol, u8); |
| 226 | GI_DEVICE_DESC_SIMPLE_RW(bMaxPacketSize0, u8); |
| 227 | GI_DEVICE_DESC_SIMPLE_RW(idVendor, u16); |
| 228 | GI_DEVICE_DESC_SIMPLE_RW(idProduct, u16); |
| 229 | GI_DEVICE_DESC_SIMPLE_R_u16(bcdDevice); |
| 230 | |
| 231 | static ssize_t is_valid_bcd(u16 bcd_val) |
| 232 | { |
| 233 | if ((bcd_val & 0xf) > 9) |
| 234 | return -EINVAL; |
| 235 | if (((bcd_val >> 4) & 0xf) > 9) |
| 236 | return -EINVAL; |
| 237 | if (((bcd_val >> 8) & 0xf) > 9) |
| 238 | return -EINVAL; |
| 239 | if (((bcd_val >> 12) & 0xf) > 9) |
| 240 | return -EINVAL; |
| 241 | return 0; |
| 242 | } |
| 243 | |
Christoph Hellwig | 45b6a73 | 2015-10-03 15:32:38 +0200 | [diff] [blame] | 244 | static ssize_t gadget_dev_desc_bcdDevice_store(struct config_item *item, |
Sebastian Andrzej Siewior | 88af8bb | 2012-12-23 21:10:24 +0100 | [diff] [blame] | 245 | const char *page, size_t len) |
| 246 | { |
| 247 | u16 bcdDevice; |
| 248 | int ret; |
| 249 | |
| 250 | ret = kstrtou16(page, 0, &bcdDevice); |
| 251 | if (ret) |
| 252 | return ret; |
| 253 | ret = is_valid_bcd(bcdDevice); |
| 254 | if (ret) |
| 255 | return ret; |
| 256 | |
Christoph Hellwig | 45b6a73 | 2015-10-03 15:32:38 +0200 | [diff] [blame] | 257 | to_gadget_info(item)->cdev.desc.bcdDevice = cpu_to_le16(bcdDevice); |
Sebastian Andrzej Siewior | 88af8bb | 2012-12-23 21:10:24 +0100 | [diff] [blame] | 258 | return len; |
| 259 | } |
| 260 | |
Christoph Hellwig | 45b6a73 | 2015-10-03 15:32:38 +0200 | [diff] [blame] | 261 | static ssize_t gadget_dev_desc_bcdUSB_store(struct config_item *item, |
Sebastian Andrzej Siewior | 88af8bb | 2012-12-23 21:10:24 +0100 | [diff] [blame] | 262 | const char *page, size_t len) |
| 263 | { |
| 264 | u16 bcdUSB; |
| 265 | int ret; |
| 266 | |
| 267 | ret = kstrtou16(page, 0, &bcdUSB); |
| 268 | if (ret) |
| 269 | return ret; |
| 270 | ret = is_valid_bcd(bcdUSB); |
| 271 | if (ret) |
| 272 | return ret; |
| 273 | |
Christoph Hellwig | 45b6a73 | 2015-10-03 15:32:38 +0200 | [diff] [blame] | 274 | to_gadget_info(item)->cdev.desc.bcdUSB = cpu_to_le16(bcdUSB); |
Sebastian Andrzej Siewior | 88af8bb | 2012-12-23 21:10:24 +0100 | [diff] [blame] | 275 | return len; |
| 276 | } |
| 277 | |
Christoph Hellwig | 45b6a73 | 2015-10-03 15:32:38 +0200 | [diff] [blame] | 278 | static ssize_t gadget_dev_desc_UDC_show(struct config_item *item, char *page) |
Sebastian Andrzej Siewior | 88af8bb | 2012-12-23 21:10:24 +0100 | [diff] [blame] | 279 | { |
Ruslan Bilovol | afdaadc | 2015-11-23 09:56:36 +0100 | [diff] [blame] | 280 | char *udc_name = to_gadget_info(item)->composite.gadget_driver.udc_name; |
| 281 | |
| 282 | return sprintf(page, "%s\n", udc_name ?: ""); |
Sebastian Andrzej Siewior | 88af8bb | 2012-12-23 21:10:24 +0100 | [diff] [blame] | 283 | } |
| 284 | |
| 285 | static int unregister_gadget(struct gadget_info *gi) |
| 286 | { |
| 287 | int ret; |
| 288 | |
Ruslan Bilovol | afdaadc | 2015-11-23 09:56:36 +0100 | [diff] [blame] | 289 | if (!gi->composite.gadget_driver.udc_name) |
Sebastian Andrzej Siewior | 88af8bb | 2012-12-23 21:10:24 +0100 | [diff] [blame] | 290 | return -ENODEV; |
| 291 | |
Vijayavardhan Vennapusa | 4ca835b | 2017-10-30 14:33:51 +0530 | [diff] [blame] | 292 | gi->unbinding = true; |
Sebastian Andrzej Siewior | 88af8bb | 2012-12-23 21:10:24 +0100 | [diff] [blame] | 293 | ret = usb_gadget_unregister_driver(&gi->composite.gadget_driver); |
| 294 | if (ret) |
| 295 | return ret; |
Vijayavardhan Vennapusa | 4ca835b | 2017-10-30 14:33:51 +0530 | [diff] [blame] | 296 | |
| 297 | gi->unbinding = false; |
Ruslan Bilovol | afdaadc | 2015-11-23 09:56:36 +0100 | [diff] [blame] | 298 | kfree(gi->composite.gadget_driver.udc_name); |
| 299 | gi->composite.gadget_driver.udc_name = NULL; |
Sebastian Andrzej Siewior | 88af8bb | 2012-12-23 21:10:24 +0100 | [diff] [blame] | 300 | return 0; |
| 301 | } |
| 302 | |
Christoph Hellwig | 45b6a73 | 2015-10-03 15:32:38 +0200 | [diff] [blame] | 303 | static ssize_t gadget_dev_desc_UDC_store(struct config_item *item, |
Sebastian Andrzej Siewior | 88af8bb | 2012-12-23 21:10:24 +0100 | [diff] [blame] | 304 | const char *page, size_t len) |
| 305 | { |
Christoph Hellwig | 45b6a73 | 2015-10-03 15:32:38 +0200 | [diff] [blame] | 306 | struct gadget_info *gi = to_gadget_info(item); |
Sebastian Andrzej Siewior | 88af8bb | 2012-12-23 21:10:24 +0100 | [diff] [blame] | 307 | char *name; |
| 308 | int ret; |
| 309 | |
| 310 | name = kstrdup(page, GFP_KERNEL); |
| 311 | if (!name) |
| 312 | return -ENOMEM; |
| 313 | if (name[len - 1] == '\n') |
| 314 | name[len - 1] = '\0'; |
| 315 | |
| 316 | mutex_lock(&gi->lock); |
| 317 | |
Badhri Jagan Sridharan | 1c3865d | 2014-12-15 10:44:47 -0800 | [diff] [blame] | 318 | if (!strlen(name) || strcmp(name, "none") == 0) { |
Sebastian Andrzej Siewior | 88af8bb | 2012-12-23 21:10:24 +0100 | [diff] [blame] | 319 | ret = unregister_gadget(gi); |
| 320 | if (ret) |
| 321 | goto err; |
John Keeping | 59682e7 | 2017-02-28 10:55:30 +0000 | [diff] [blame] | 322 | kfree(name); |
Sebastian Andrzej Siewior | 88af8bb | 2012-12-23 21:10:24 +0100 | [diff] [blame] | 323 | } else { |
Ruslan Bilovol | afdaadc | 2015-11-23 09:56:36 +0100 | [diff] [blame] | 324 | if (gi->composite.gadget_driver.udc_name) { |
Sebastian Andrzej Siewior | 88af8bb | 2012-12-23 21:10:24 +0100 | [diff] [blame] | 325 | ret = -EBUSY; |
| 326 | goto err; |
| 327 | } |
Ruslan Bilovol | afdaadc | 2015-11-23 09:56:36 +0100 | [diff] [blame] | 328 | gi->composite.gadget_driver.udc_name = name; |
| 329 | ret = usb_gadget_probe_driver(&gi->composite.gadget_driver); |
| 330 | if (ret) { |
| 331 | gi->composite.gadget_driver.udc_name = NULL; |
Sebastian Andrzej Siewior | 88af8bb | 2012-12-23 21:10:24 +0100 | [diff] [blame] | 332 | goto err; |
Ruslan Bilovol | afdaadc | 2015-11-23 09:56:36 +0100 | [diff] [blame] | 333 | } |
Chandana Kishori Chiluveru | b92f133 | 2019-06-11 12:38:42 +0530 | [diff] [blame] | 334 | schedule_work(&gi->work); |
Sebastian Andrzej Siewior | 88af8bb | 2012-12-23 21:10:24 +0100 | [diff] [blame] | 335 | } |
| 336 | mutex_unlock(&gi->lock); |
| 337 | return len; |
| 338 | err: |
| 339 | kfree(name); |
| 340 | mutex_unlock(&gi->lock); |
| 341 | return ret; |
| 342 | } |
| 343 | |
Christoph Hellwig | 45b6a73 | 2015-10-03 15:32:38 +0200 | [diff] [blame] | 344 | CONFIGFS_ATTR(gadget_dev_desc_, bDeviceClass); |
| 345 | CONFIGFS_ATTR(gadget_dev_desc_, bDeviceSubClass); |
| 346 | CONFIGFS_ATTR(gadget_dev_desc_, bDeviceProtocol); |
| 347 | CONFIGFS_ATTR(gadget_dev_desc_, bMaxPacketSize0); |
| 348 | CONFIGFS_ATTR(gadget_dev_desc_, idVendor); |
| 349 | CONFIGFS_ATTR(gadget_dev_desc_, idProduct); |
| 350 | CONFIGFS_ATTR(gadget_dev_desc_, bcdDevice); |
| 351 | CONFIGFS_ATTR(gadget_dev_desc_, bcdUSB); |
| 352 | CONFIGFS_ATTR(gadget_dev_desc_, UDC); |
Sebastian Andrzej Siewior | 88af8bb | 2012-12-23 21:10:24 +0100 | [diff] [blame] | 353 | |
| 354 | static struct configfs_attribute *gadget_root_attrs[] = { |
Christoph Hellwig | 45b6a73 | 2015-10-03 15:32:38 +0200 | [diff] [blame] | 355 | &gadget_dev_desc_attr_bDeviceClass, |
| 356 | &gadget_dev_desc_attr_bDeviceSubClass, |
| 357 | &gadget_dev_desc_attr_bDeviceProtocol, |
| 358 | &gadget_dev_desc_attr_bMaxPacketSize0, |
| 359 | &gadget_dev_desc_attr_idVendor, |
| 360 | &gadget_dev_desc_attr_idProduct, |
| 361 | &gadget_dev_desc_attr_bcdDevice, |
| 362 | &gadget_dev_desc_attr_bcdUSB, |
| 363 | &gadget_dev_desc_attr_UDC, |
Sebastian Andrzej Siewior | 88af8bb | 2012-12-23 21:10:24 +0100 | [diff] [blame] | 364 | NULL, |
| 365 | }; |
| 366 | |
Sebastian Andrzej Siewior | 88af8bb | 2012-12-23 21:10:24 +0100 | [diff] [blame] | 367 | static inline struct gadget_strings *to_gadget_strings(struct config_item *item) |
| 368 | { |
| 369 | return container_of(to_config_group(item), struct gadget_strings, |
| 370 | group); |
| 371 | } |
| 372 | |
| 373 | static inline struct gadget_config_name *to_gadget_config_name( |
| 374 | struct config_item *item) |
| 375 | { |
| 376 | return container_of(to_config_group(item), struct gadget_config_name, |
| 377 | group); |
| 378 | } |
| 379 | |
Sebastian Andrzej Siewior | 88af8bb | 2012-12-23 21:10:24 +0100 | [diff] [blame] | 380 | static inline struct usb_function_instance *to_usb_function_instance( |
| 381 | struct config_item *item) |
| 382 | { |
| 383 | return container_of(to_config_group(item), |
| 384 | struct usb_function_instance, group); |
| 385 | } |
| 386 | |
| 387 | static void gadget_info_attr_release(struct config_item *item) |
| 388 | { |
| 389 | struct gadget_info *gi = to_gadget_info(item); |
| 390 | |
| 391 | WARN_ON(!list_empty(&gi->cdev.configs)); |
| 392 | WARN_ON(!list_empty(&gi->string_list)); |
| 393 | WARN_ON(!list_empty(&gi->available_func)); |
| 394 | kfree(gi->composite.gadget_driver.function); |
| 395 | kfree(gi); |
| 396 | } |
| 397 | |
Sebastian Andrzej Siewior | 88af8bb | 2012-12-23 21:10:24 +0100 | [diff] [blame] | 398 | static struct configfs_item_operations gadget_root_item_ops = { |
| 399 | .release = gadget_info_attr_release, |
Sebastian Andrzej Siewior | 88af8bb | 2012-12-23 21:10:24 +0100 | [diff] [blame] | 400 | }; |
| 401 | |
| 402 | static void gadget_config_attr_release(struct config_item *item) |
| 403 | { |
| 404 | struct config_usb_cfg *cfg = to_config_usb_cfg(item); |
| 405 | |
| 406 | WARN_ON(!list_empty(&cfg->c.functions)); |
| 407 | list_del(&cfg->c.list); |
| 408 | kfree(cfg->c.label); |
| 409 | kfree(cfg); |
| 410 | } |
| 411 | |
| 412 | static int config_usb_cfg_link( |
| 413 | struct config_item *usb_cfg_ci, |
| 414 | struct config_item *usb_func_ci) |
| 415 | { |
| 416 | struct config_usb_cfg *cfg = to_config_usb_cfg(usb_cfg_ci); |
| 417 | struct usb_composite_dev *cdev = cfg->c.cdev; |
| 418 | struct gadget_info *gi = container_of(cdev, struct gadget_info, cdev); |
| 419 | |
| 420 | struct config_group *group = to_config_group(usb_func_ci); |
| 421 | struct usb_function_instance *fi = container_of(group, |
| 422 | struct usb_function_instance, group); |
| 423 | struct usb_function_instance *a_fi; |
| 424 | struct usb_function *f; |
| 425 | int ret; |
| 426 | |
| 427 | mutex_lock(&gi->lock); |
| 428 | /* |
| 429 | * Make sure this function is from within our _this_ gadget and not |
| 430 | * from another gadget or a random directory. |
| 431 | * Also a function instance can only be linked once. |
| 432 | */ |
| 433 | list_for_each_entry(a_fi, &gi->available_func, cfs_list) { |
| 434 | if (a_fi == fi) |
| 435 | break; |
| 436 | } |
| 437 | if (a_fi != fi) { |
| 438 | ret = -EINVAL; |
| 439 | goto out; |
| 440 | } |
| 441 | |
| 442 | list_for_each_entry(f, &cfg->func_list, list) { |
| 443 | if (f->fi == fi) { |
| 444 | ret = -EEXIST; |
| 445 | goto out; |
| 446 | } |
| 447 | } |
| 448 | |
| 449 | f = usb_get_function(fi); |
| 450 | if (IS_ERR(f)) { |
| 451 | ret = PTR_ERR(f); |
| 452 | goto out; |
| 453 | } |
| 454 | |
| 455 | /* stash the function until we bind it to the gadget */ |
| 456 | list_add_tail(&f->list, &cfg->func_list); |
| 457 | ret = 0; |
| 458 | out: |
| 459 | mutex_unlock(&gi->lock); |
| 460 | return ret; |
| 461 | } |
| 462 | |
| 463 | static int config_usb_cfg_unlink( |
| 464 | struct config_item *usb_cfg_ci, |
| 465 | struct config_item *usb_func_ci) |
| 466 | { |
| 467 | struct config_usb_cfg *cfg = to_config_usb_cfg(usb_cfg_ci); |
| 468 | struct usb_composite_dev *cdev = cfg->c.cdev; |
| 469 | struct gadget_info *gi = container_of(cdev, struct gadget_info, cdev); |
| 470 | |
| 471 | struct config_group *group = to_config_group(usb_func_ci); |
| 472 | struct usb_function_instance *fi = container_of(group, |
| 473 | struct usb_function_instance, group); |
| 474 | struct usb_function *f; |
| 475 | |
| 476 | /* |
| 477 | * ideally I would like to forbid to unlink functions while a gadget is |
| 478 | * bound to an UDC. Since this isn't possible at the moment, we simply |
| 479 | * force an unbind, the function is available here and then we can |
| 480 | * remove the function. |
| 481 | */ |
| 482 | mutex_lock(&gi->lock); |
Ruslan Bilovol | afdaadc | 2015-11-23 09:56:36 +0100 | [diff] [blame] | 483 | if (gi->composite.gadget_driver.udc_name) |
Sebastian Andrzej Siewior | 88af8bb | 2012-12-23 21:10:24 +0100 | [diff] [blame] | 484 | unregister_gadget(gi); |
Ruslan Bilovol | afdaadc | 2015-11-23 09:56:36 +0100 | [diff] [blame] | 485 | WARN_ON(gi->composite.gadget_driver.udc_name); |
Sebastian Andrzej Siewior | 88af8bb | 2012-12-23 21:10:24 +0100 | [diff] [blame] | 486 | |
| 487 | list_for_each_entry(f, &cfg->func_list, list) { |
| 488 | if (f->fi == fi) { |
| 489 | list_del(&f->list); |
| 490 | usb_put_function(f); |
| 491 | mutex_unlock(&gi->lock); |
| 492 | return 0; |
| 493 | } |
| 494 | } |
| 495 | mutex_unlock(&gi->lock); |
David Rientjes | 75bfe23 | 2013-04-07 14:11:47 -0700 | [diff] [blame] | 496 | WARN(1, "Unable to locate function to unbind\n"); |
Sebastian Andrzej Siewior | 88af8bb | 2012-12-23 21:10:24 +0100 | [diff] [blame] | 497 | return 0; |
| 498 | } |
| 499 | |
Sebastian Andrzej Siewior | 88af8bb | 2012-12-23 21:10:24 +0100 | [diff] [blame] | 500 | static struct configfs_item_operations gadget_config_item_ops = { |
| 501 | .release = gadget_config_attr_release, |
Sebastian Andrzej Siewior | 88af8bb | 2012-12-23 21:10:24 +0100 | [diff] [blame] | 502 | .allow_link = config_usb_cfg_link, |
| 503 | .drop_link = config_usb_cfg_unlink, |
| 504 | }; |
| 505 | |
| 506 | |
Christoph Hellwig | 45b6a73 | 2015-10-03 15:32:38 +0200 | [diff] [blame] | 507 | static ssize_t gadget_config_desc_MaxPower_show(struct config_item *item, |
Sebastian Andrzej Siewior | 88af8bb | 2012-12-23 21:10:24 +0100 | [diff] [blame] | 508 | char *page) |
| 509 | { |
Christoph Hellwig | 45b6a73 | 2015-10-03 15:32:38 +0200 | [diff] [blame] | 510 | return sprintf(page, "%u\n", to_config_usb_cfg(item)->c.MaxPower); |
Sebastian Andrzej Siewior | 88af8bb | 2012-12-23 21:10:24 +0100 | [diff] [blame] | 511 | } |
| 512 | |
Christoph Hellwig | 45b6a73 | 2015-10-03 15:32:38 +0200 | [diff] [blame] | 513 | static ssize_t gadget_config_desc_MaxPower_store(struct config_item *item, |
Sebastian Andrzej Siewior | 88af8bb | 2012-12-23 21:10:24 +0100 | [diff] [blame] | 514 | const char *page, size_t len) |
| 515 | { |
| 516 | u16 val; |
| 517 | int ret; |
| 518 | ret = kstrtou16(page, 0, &val); |
| 519 | if (ret) |
| 520 | return ret; |
| 521 | if (DIV_ROUND_UP(val, 8) > 0xff) |
| 522 | return -ERANGE; |
Christoph Hellwig | 45b6a73 | 2015-10-03 15:32:38 +0200 | [diff] [blame] | 523 | to_config_usb_cfg(item)->c.MaxPower = val; |
Sebastian Andrzej Siewior | 88af8bb | 2012-12-23 21:10:24 +0100 | [diff] [blame] | 524 | return len; |
| 525 | } |
| 526 | |
Christoph Hellwig | 45b6a73 | 2015-10-03 15:32:38 +0200 | [diff] [blame] | 527 | static ssize_t gadget_config_desc_bmAttributes_show(struct config_item *item, |
Sebastian Andrzej Siewior | 88af8bb | 2012-12-23 21:10:24 +0100 | [diff] [blame] | 528 | char *page) |
| 529 | { |
Christoph Hellwig | 45b6a73 | 2015-10-03 15:32:38 +0200 | [diff] [blame] | 530 | return sprintf(page, "0x%02x\n", |
| 531 | to_config_usb_cfg(item)->c.bmAttributes); |
Sebastian Andrzej Siewior | 88af8bb | 2012-12-23 21:10:24 +0100 | [diff] [blame] | 532 | } |
| 533 | |
Christoph Hellwig | 45b6a73 | 2015-10-03 15:32:38 +0200 | [diff] [blame] | 534 | static ssize_t gadget_config_desc_bmAttributes_store(struct config_item *item, |
Sebastian Andrzej Siewior | 88af8bb | 2012-12-23 21:10:24 +0100 | [diff] [blame] | 535 | const char *page, size_t len) |
| 536 | { |
| 537 | u8 val; |
| 538 | int ret; |
| 539 | ret = kstrtou8(page, 0, &val); |
| 540 | if (ret) |
| 541 | return ret; |
| 542 | if (!(val & USB_CONFIG_ATT_ONE)) |
| 543 | return -EINVAL; |
| 544 | if (val & ~(USB_CONFIG_ATT_ONE | USB_CONFIG_ATT_SELFPOWER | |
| 545 | USB_CONFIG_ATT_WAKEUP)) |
| 546 | return -EINVAL; |
Christoph Hellwig | 45b6a73 | 2015-10-03 15:32:38 +0200 | [diff] [blame] | 547 | to_config_usb_cfg(item)->c.bmAttributes = val; |
Sebastian Andrzej Siewior | 88af8bb | 2012-12-23 21:10:24 +0100 | [diff] [blame] | 548 | return len; |
| 549 | } |
| 550 | |
Christoph Hellwig | 45b6a73 | 2015-10-03 15:32:38 +0200 | [diff] [blame] | 551 | CONFIGFS_ATTR(gadget_config_desc_, MaxPower); |
| 552 | CONFIGFS_ATTR(gadget_config_desc_, bmAttributes); |
Sebastian Andrzej Siewior | 88af8bb | 2012-12-23 21:10:24 +0100 | [diff] [blame] | 553 | |
| 554 | static struct configfs_attribute *gadget_config_attrs[] = { |
Christoph Hellwig | 45b6a73 | 2015-10-03 15:32:38 +0200 | [diff] [blame] | 555 | &gadget_config_desc_attr_MaxPower, |
| 556 | &gadget_config_desc_attr_bmAttributes, |
Sebastian Andrzej Siewior | 88af8bb | 2012-12-23 21:10:24 +0100 | [diff] [blame] | 557 | NULL, |
| 558 | }; |
| 559 | |
| 560 | static struct config_item_type gadget_config_type = { |
| 561 | .ct_item_ops = &gadget_config_item_ops, |
| 562 | .ct_attrs = gadget_config_attrs, |
| 563 | .ct_owner = THIS_MODULE, |
| 564 | }; |
| 565 | |
| 566 | static struct config_item_type gadget_root_type = { |
| 567 | .ct_item_ops = &gadget_root_item_ops, |
| 568 | .ct_attrs = gadget_root_attrs, |
| 569 | .ct_owner = THIS_MODULE, |
| 570 | }; |
| 571 | |
| 572 | static void composite_init_dev(struct usb_composite_dev *cdev) |
| 573 | { |
| 574 | spin_lock_init(&cdev->lock); |
| 575 | INIT_LIST_HEAD(&cdev->configs); |
| 576 | INIT_LIST_HEAD(&cdev->gstrings); |
| 577 | } |
| 578 | |
| 579 | static struct config_group *function_make( |
| 580 | struct config_group *group, |
| 581 | const char *name) |
| 582 | { |
| 583 | struct gadget_info *gi; |
| 584 | struct usb_function_instance *fi; |
| 585 | char buf[MAX_NAME_LEN]; |
| 586 | char *func_name; |
| 587 | char *instance_name; |
| 588 | int ret; |
| 589 | |
| 590 | ret = snprintf(buf, MAX_NAME_LEN, "%s", name); |
| 591 | if (ret >= MAX_NAME_LEN) |
| 592 | return ERR_PTR(-ENAMETOOLONG); |
| 593 | |
| 594 | func_name = buf; |
| 595 | instance_name = strchr(func_name, '.'); |
| 596 | if (!instance_name) { |
| 597 | pr_err("Unable to locate . in FUNC.INSTANCE\n"); |
| 598 | return ERR_PTR(-EINVAL); |
| 599 | } |
| 600 | *instance_name = '\0'; |
| 601 | instance_name++; |
| 602 | |
| 603 | fi = usb_get_function_instance(func_name); |
| 604 | if (IS_ERR(fi)) |
Duan Jiong | a346941 | 2013-09-26 15:55:25 +0800 | [diff] [blame] | 605 | return ERR_CAST(fi); |
Sebastian Andrzej Siewior | 88af8bb | 2012-12-23 21:10:24 +0100 | [diff] [blame] | 606 | |
Nicolas Iooss | 3958b79 | 2015-07-17 16:23:45 -0700 | [diff] [blame] | 607 | ret = config_item_set_name(&fi->group.cg_item, "%s", name); |
Sebastian Andrzej Siewior | 88af8bb | 2012-12-23 21:10:24 +0100 | [diff] [blame] | 608 | if (ret) { |
| 609 | usb_put_function_instance(fi); |
| 610 | return ERR_PTR(ret); |
| 611 | } |
Andrzej Pietrasiewicz | 1933861 | 2013-12-03 15:15:21 +0100 | [diff] [blame] | 612 | if (fi->set_inst_name) { |
| 613 | ret = fi->set_inst_name(fi, instance_name); |
| 614 | if (ret) { |
| 615 | usb_put_function_instance(fi); |
| 616 | return ERR_PTR(ret); |
| 617 | } |
| 618 | } |
Sebastian Andrzej Siewior | 88af8bb | 2012-12-23 21:10:24 +0100 | [diff] [blame] | 619 | |
| 620 | gi = container_of(group, struct gadget_info, functions_group); |
| 621 | |
| 622 | mutex_lock(&gi->lock); |
| 623 | list_add_tail(&fi->cfs_list, &gi->available_func); |
| 624 | mutex_unlock(&gi->lock); |
| 625 | return &fi->group; |
| 626 | } |
| 627 | |
| 628 | static void function_drop( |
| 629 | struct config_group *group, |
| 630 | struct config_item *item) |
| 631 | { |
| 632 | struct usb_function_instance *fi = to_usb_function_instance(item); |
| 633 | struct gadget_info *gi; |
| 634 | |
| 635 | gi = container_of(group, struct gadget_info, functions_group); |
| 636 | |
| 637 | mutex_lock(&gi->lock); |
| 638 | list_del(&fi->cfs_list); |
| 639 | mutex_unlock(&gi->lock); |
| 640 | config_item_put(item); |
| 641 | } |
| 642 | |
| 643 | static struct configfs_group_operations functions_ops = { |
| 644 | .make_group = &function_make, |
| 645 | .drop_item = &function_drop, |
| 646 | }; |
| 647 | |
| 648 | static struct config_item_type functions_type = { |
| 649 | .ct_group_ops = &functions_ops, |
| 650 | .ct_owner = THIS_MODULE, |
| 651 | }; |
| 652 | |
Sebastian Andrzej Siewior | 88af8bb | 2012-12-23 21:10:24 +0100 | [diff] [blame] | 653 | GS_STRINGS_RW(gadget_config_name, configuration); |
| 654 | |
| 655 | static struct configfs_attribute *gadget_config_name_langid_attrs[] = { |
Christoph Hellwig | 45b6a73 | 2015-10-03 15:32:38 +0200 | [diff] [blame] | 656 | &gadget_config_name_attr_configuration, |
Sebastian Andrzej Siewior | 88af8bb | 2012-12-23 21:10:24 +0100 | [diff] [blame] | 657 | NULL, |
| 658 | }; |
| 659 | |
| 660 | static void gadget_config_name_attr_release(struct config_item *item) |
| 661 | { |
| 662 | struct gadget_config_name *cn = to_gadget_config_name(item); |
| 663 | |
| 664 | kfree(cn->configuration); |
| 665 | |
| 666 | list_del(&cn->list); |
| 667 | kfree(cn); |
| 668 | } |
| 669 | |
| 670 | USB_CONFIG_STRING_RW_OPS(gadget_config_name); |
| 671 | USB_CONFIG_STRINGS_LANG(gadget_config_name, config_usb_cfg); |
| 672 | |
| 673 | static struct config_group *config_desc_make( |
| 674 | struct config_group *group, |
| 675 | const char *name) |
| 676 | { |
| 677 | struct gadget_info *gi; |
| 678 | struct config_usb_cfg *cfg; |
| 679 | char buf[MAX_NAME_LEN]; |
| 680 | char *num_str; |
| 681 | u8 num; |
| 682 | int ret; |
| 683 | |
| 684 | gi = container_of(group, struct gadget_info, configs_group); |
| 685 | ret = snprintf(buf, MAX_NAME_LEN, "%s", name); |
| 686 | if (ret >= MAX_NAME_LEN) |
| 687 | return ERR_PTR(-ENAMETOOLONG); |
| 688 | |
| 689 | num_str = strchr(buf, '.'); |
| 690 | if (!num_str) { |
| 691 | pr_err("Unable to locate . in name.bConfigurationValue\n"); |
| 692 | return ERR_PTR(-EINVAL); |
| 693 | } |
| 694 | |
| 695 | *num_str = '\0'; |
| 696 | num_str++; |
| 697 | |
| 698 | if (!strlen(buf)) |
| 699 | return ERR_PTR(-EINVAL); |
| 700 | |
| 701 | ret = kstrtou8(num_str, 0, &num); |
| 702 | if (ret) |
| 703 | return ERR_PTR(ret); |
| 704 | |
| 705 | cfg = kzalloc(sizeof(*cfg), GFP_KERNEL); |
| 706 | if (!cfg) |
| 707 | return ERR_PTR(-ENOMEM); |
| 708 | cfg->c.label = kstrdup(buf, GFP_KERNEL); |
| 709 | if (!cfg->c.label) { |
| 710 | ret = -ENOMEM; |
| 711 | goto err; |
| 712 | } |
| 713 | cfg->c.bConfigurationValue = num; |
| 714 | cfg->c.MaxPower = CONFIG_USB_GADGET_VBUS_DRAW; |
| 715 | cfg->c.bmAttributes = USB_CONFIG_ATT_ONE; |
| 716 | INIT_LIST_HEAD(&cfg->string_list); |
| 717 | INIT_LIST_HEAD(&cfg->func_list); |
| 718 | |
Sebastian Andrzej Siewior | 88af8bb | 2012-12-23 21:10:24 +0100 | [diff] [blame] | 719 | config_group_init_type_name(&cfg->group, name, |
| 720 | &gadget_config_type); |
Christoph Hellwig | 1ae1602 | 2016-02-26 11:02:14 +0100 | [diff] [blame] | 721 | |
Sebastian Andrzej Siewior | 88af8bb | 2012-12-23 21:10:24 +0100 | [diff] [blame] | 722 | config_group_init_type_name(&cfg->strings_group, "strings", |
| 723 | &gadget_config_name_strings_type); |
Christoph Hellwig | 1ae1602 | 2016-02-26 11:02:14 +0100 | [diff] [blame] | 724 | configfs_add_default_group(&cfg->strings_group, &cfg->group); |
Sebastian Andrzej Siewior | 88af8bb | 2012-12-23 21:10:24 +0100 | [diff] [blame] | 725 | |
| 726 | ret = usb_add_config_only(&gi->cdev, &cfg->c); |
| 727 | if (ret) |
| 728 | goto err; |
| 729 | |
| 730 | return &cfg->group; |
| 731 | err: |
| 732 | kfree(cfg->c.label); |
| 733 | kfree(cfg); |
| 734 | return ERR_PTR(ret); |
| 735 | } |
| 736 | |
| 737 | static void config_desc_drop( |
| 738 | struct config_group *group, |
| 739 | struct config_item *item) |
| 740 | { |
| 741 | config_item_put(item); |
| 742 | } |
| 743 | |
| 744 | static struct configfs_group_operations config_desc_ops = { |
| 745 | .make_group = &config_desc_make, |
| 746 | .drop_item = &config_desc_drop, |
| 747 | }; |
| 748 | |
| 749 | static struct config_item_type config_desc_type = { |
| 750 | .ct_group_ops = &config_desc_ops, |
| 751 | .ct_owner = THIS_MODULE, |
| 752 | }; |
| 753 | |
Sebastian Andrzej Siewior | 88af8bb | 2012-12-23 21:10:24 +0100 | [diff] [blame] | 754 | GS_STRINGS_RW(gadget_strings, manufacturer); |
| 755 | GS_STRINGS_RW(gadget_strings, product); |
| 756 | GS_STRINGS_RW(gadget_strings, serialnumber); |
| 757 | |
| 758 | static struct configfs_attribute *gadget_strings_langid_attrs[] = { |
Christoph Hellwig | 45b6a73 | 2015-10-03 15:32:38 +0200 | [diff] [blame] | 759 | &gadget_strings_attr_manufacturer, |
| 760 | &gadget_strings_attr_product, |
| 761 | &gadget_strings_attr_serialnumber, |
Sebastian Andrzej Siewior | 88af8bb | 2012-12-23 21:10:24 +0100 | [diff] [blame] | 762 | NULL, |
| 763 | }; |
| 764 | |
| 765 | static void gadget_strings_attr_release(struct config_item *item) |
| 766 | { |
| 767 | struct gadget_strings *gs = to_gadget_strings(item); |
| 768 | |
| 769 | kfree(gs->manufacturer); |
| 770 | kfree(gs->product); |
| 771 | kfree(gs->serialnumber); |
| 772 | |
| 773 | list_del(&gs->list); |
| 774 | kfree(gs); |
| 775 | } |
| 776 | |
| 777 | USB_CONFIG_STRING_RW_OPS(gadget_strings); |
| 778 | USB_CONFIG_STRINGS_LANG(gadget_strings, gadget_info); |
| 779 | |
Andrzej Pietrasiewicz | 87213d3 | 2014-05-08 14:06:25 +0200 | [diff] [blame] | 780 | static inline struct os_desc *to_os_desc(struct config_item *item) |
| 781 | { |
| 782 | return container_of(to_config_group(item), struct os_desc, group); |
| 783 | } |
| 784 | |
Christoph Hellwig | 45b6a73 | 2015-10-03 15:32:38 +0200 | [diff] [blame] | 785 | static inline struct gadget_info *os_desc_item_to_gadget_info( |
| 786 | struct config_item *item) |
Andrzej Pietrasiewicz | 87213d3 | 2014-05-08 14:06:25 +0200 | [diff] [blame] | 787 | { |
Christoph Hellwig | 45b6a73 | 2015-10-03 15:32:38 +0200 | [diff] [blame] | 788 | return to_gadget_info(to_os_desc(item)->group.cg_item.ci_parent); |
Andrzej Pietrasiewicz | 87213d3 | 2014-05-08 14:06:25 +0200 | [diff] [blame] | 789 | } |
| 790 | |
Christoph Hellwig | 45b6a73 | 2015-10-03 15:32:38 +0200 | [diff] [blame] | 791 | static ssize_t os_desc_use_show(struct config_item *item, char *page) |
| 792 | { |
| 793 | return sprintf(page, "%d", |
| 794 | os_desc_item_to_gadget_info(item)->use_os_desc); |
| 795 | } |
| 796 | |
| 797 | static ssize_t os_desc_use_store(struct config_item *item, const char *page, |
Andrzej Pietrasiewicz | 87213d3 | 2014-05-08 14:06:25 +0200 | [diff] [blame] | 798 | size_t len) |
| 799 | { |
Christoph Hellwig | 45b6a73 | 2015-10-03 15:32:38 +0200 | [diff] [blame] | 800 | struct gadget_info *gi = os_desc_item_to_gadget_info(item); |
Andrzej Pietrasiewicz | 87213d3 | 2014-05-08 14:06:25 +0200 | [diff] [blame] | 801 | int ret; |
| 802 | bool use; |
| 803 | |
Andrzej Pietrasiewicz | 87213d3 | 2014-05-08 14:06:25 +0200 | [diff] [blame] | 804 | mutex_lock(&gi->lock); |
| 805 | ret = strtobool(page, &use); |
| 806 | if (!ret) { |
| 807 | gi->use_os_desc = use; |
| 808 | ret = len; |
| 809 | } |
| 810 | mutex_unlock(&gi->lock); |
| 811 | |
| 812 | return ret; |
| 813 | } |
| 814 | |
Christoph Hellwig | 45b6a73 | 2015-10-03 15:32:38 +0200 | [diff] [blame] | 815 | static ssize_t os_desc_b_vendor_code_show(struct config_item *item, char *page) |
Andrzej Pietrasiewicz | 87213d3 | 2014-05-08 14:06:25 +0200 | [diff] [blame] | 816 | { |
Christoph Hellwig | 45b6a73 | 2015-10-03 15:32:38 +0200 | [diff] [blame] | 817 | return sprintf(page, "%d", |
| 818 | os_desc_item_to_gadget_info(item)->b_vendor_code); |
Andrzej Pietrasiewicz | 87213d3 | 2014-05-08 14:06:25 +0200 | [diff] [blame] | 819 | } |
| 820 | |
Christoph Hellwig | 45b6a73 | 2015-10-03 15:32:38 +0200 | [diff] [blame] | 821 | static ssize_t os_desc_b_vendor_code_store(struct config_item *item, |
Andrzej Pietrasiewicz | 87213d3 | 2014-05-08 14:06:25 +0200 | [diff] [blame] | 822 | const char *page, size_t len) |
| 823 | { |
Christoph Hellwig | 45b6a73 | 2015-10-03 15:32:38 +0200 | [diff] [blame] | 824 | struct gadget_info *gi = os_desc_item_to_gadget_info(item); |
Andrzej Pietrasiewicz | 87213d3 | 2014-05-08 14:06:25 +0200 | [diff] [blame] | 825 | int ret; |
| 826 | u8 b_vendor_code; |
| 827 | |
Andrzej Pietrasiewicz | 87213d3 | 2014-05-08 14:06:25 +0200 | [diff] [blame] | 828 | mutex_lock(&gi->lock); |
| 829 | ret = kstrtou8(page, 0, &b_vendor_code); |
| 830 | if (!ret) { |
| 831 | gi->b_vendor_code = b_vendor_code; |
| 832 | ret = len; |
| 833 | } |
| 834 | mutex_unlock(&gi->lock); |
| 835 | |
| 836 | return ret; |
| 837 | } |
| 838 | |
Christoph Hellwig | 45b6a73 | 2015-10-03 15:32:38 +0200 | [diff] [blame] | 839 | static ssize_t os_desc_qw_sign_show(struct config_item *item, char *page) |
Andrzej Pietrasiewicz | 87213d3 | 2014-05-08 14:06:25 +0200 | [diff] [blame] | 840 | { |
Christoph Hellwig | 45b6a73 | 2015-10-03 15:32:38 +0200 | [diff] [blame] | 841 | struct gadget_info *gi = os_desc_item_to_gadget_info(item); |
Andrzej Pietrasiewicz | 87213d3 | 2014-05-08 14:06:25 +0200 | [diff] [blame] | 842 | |
| 843 | memcpy(page, gi->qw_sign, OS_STRING_QW_SIGN_LEN); |
Andrzej Pietrasiewicz | 87213d3 | 2014-05-08 14:06:25 +0200 | [diff] [blame] | 844 | return OS_STRING_QW_SIGN_LEN; |
| 845 | } |
| 846 | |
Christoph Hellwig | 45b6a73 | 2015-10-03 15:32:38 +0200 | [diff] [blame] | 847 | static ssize_t os_desc_qw_sign_store(struct config_item *item, const char *page, |
Andrzej Pietrasiewicz | 87213d3 | 2014-05-08 14:06:25 +0200 | [diff] [blame] | 848 | size_t len) |
| 849 | { |
Christoph Hellwig | 45b6a73 | 2015-10-03 15:32:38 +0200 | [diff] [blame] | 850 | struct gadget_info *gi = os_desc_item_to_gadget_info(item); |
Andrzej Pietrasiewicz | 87213d3 | 2014-05-08 14:06:25 +0200 | [diff] [blame] | 851 | int res, l; |
| 852 | |
Andrzej Pietrasiewicz | 87213d3 | 2014-05-08 14:06:25 +0200 | [diff] [blame] | 853 | l = min((int)len, OS_STRING_QW_SIGN_LEN >> 1); |
| 854 | if (page[l - 1] == '\n') |
| 855 | --l; |
| 856 | |
| 857 | mutex_lock(&gi->lock); |
| 858 | res = utf8s_to_utf16s(page, l, |
| 859 | UTF16_LITTLE_ENDIAN, (wchar_t *) gi->qw_sign, |
| 860 | OS_STRING_QW_SIGN_LEN); |
| 861 | if (res > 0) |
| 862 | res = len; |
| 863 | mutex_unlock(&gi->lock); |
| 864 | |
| 865 | return res; |
| 866 | } |
| 867 | |
Christoph Hellwig | 45b6a73 | 2015-10-03 15:32:38 +0200 | [diff] [blame] | 868 | CONFIGFS_ATTR(os_desc_, use); |
| 869 | CONFIGFS_ATTR(os_desc_, b_vendor_code); |
| 870 | CONFIGFS_ATTR(os_desc_, qw_sign); |
Andrzej Pietrasiewicz | 87213d3 | 2014-05-08 14:06:25 +0200 | [diff] [blame] | 871 | |
| 872 | static struct configfs_attribute *os_desc_attrs[] = { |
Christoph Hellwig | 45b6a73 | 2015-10-03 15:32:38 +0200 | [diff] [blame] | 873 | &os_desc_attr_use, |
| 874 | &os_desc_attr_b_vendor_code, |
| 875 | &os_desc_attr_qw_sign, |
Andrzej Pietrasiewicz | 87213d3 | 2014-05-08 14:06:25 +0200 | [diff] [blame] | 876 | NULL, |
| 877 | }; |
| 878 | |
| 879 | static void os_desc_attr_release(struct config_item *item) |
| 880 | { |
| 881 | struct os_desc *os_desc = to_os_desc(item); |
| 882 | kfree(os_desc); |
| 883 | } |
| 884 | |
Andrzej Pietrasiewicz | da42431 | 2014-05-08 14:06:26 +0200 | [diff] [blame] | 885 | static int os_desc_link(struct config_item *os_desc_ci, |
| 886 | struct config_item *usb_cfg_ci) |
| 887 | { |
| 888 | struct gadget_info *gi = container_of(to_config_group(os_desc_ci), |
| 889 | struct gadget_info, os_desc_group); |
| 890 | struct usb_composite_dev *cdev = &gi->cdev; |
| 891 | struct config_usb_cfg *c_target = |
| 892 | container_of(to_config_group(usb_cfg_ci), |
| 893 | struct config_usb_cfg, group); |
| 894 | struct usb_configuration *c; |
| 895 | int ret; |
| 896 | |
| 897 | mutex_lock(&gi->lock); |
| 898 | list_for_each_entry(c, &cdev->configs, list) { |
| 899 | if (c == &c_target->c) |
| 900 | break; |
| 901 | } |
| 902 | if (c != &c_target->c) { |
| 903 | ret = -EINVAL; |
| 904 | goto out; |
| 905 | } |
| 906 | |
| 907 | if (cdev->os_desc_config) { |
| 908 | ret = -EBUSY; |
| 909 | goto out; |
| 910 | } |
| 911 | |
| 912 | cdev->os_desc_config = &c_target->c; |
| 913 | ret = 0; |
| 914 | |
| 915 | out: |
| 916 | mutex_unlock(&gi->lock); |
| 917 | return ret; |
| 918 | } |
| 919 | |
| 920 | static int os_desc_unlink(struct config_item *os_desc_ci, |
| 921 | struct config_item *usb_cfg_ci) |
| 922 | { |
| 923 | struct gadget_info *gi = container_of(to_config_group(os_desc_ci), |
| 924 | struct gadget_info, os_desc_group); |
| 925 | struct usb_composite_dev *cdev = &gi->cdev; |
| 926 | |
| 927 | mutex_lock(&gi->lock); |
Ruslan Bilovol | afdaadc | 2015-11-23 09:56:36 +0100 | [diff] [blame] | 928 | if (gi->composite.gadget_driver.udc_name) |
Andrzej Pietrasiewicz | da42431 | 2014-05-08 14:06:26 +0200 | [diff] [blame] | 929 | unregister_gadget(gi); |
| 930 | cdev->os_desc_config = NULL; |
Ruslan Bilovol | afdaadc | 2015-11-23 09:56:36 +0100 | [diff] [blame] | 931 | WARN_ON(gi->composite.gadget_driver.udc_name); |
Andrzej Pietrasiewicz | da42431 | 2014-05-08 14:06:26 +0200 | [diff] [blame] | 932 | mutex_unlock(&gi->lock); |
| 933 | return 0; |
| 934 | } |
| 935 | |
Andrzej Pietrasiewicz | 87213d3 | 2014-05-08 14:06:25 +0200 | [diff] [blame] | 936 | static struct configfs_item_operations os_desc_ops = { |
| 937 | .release = os_desc_attr_release, |
Andrzej Pietrasiewicz | da42431 | 2014-05-08 14:06:26 +0200 | [diff] [blame] | 938 | .allow_link = os_desc_link, |
| 939 | .drop_link = os_desc_unlink, |
Andrzej Pietrasiewicz | 87213d3 | 2014-05-08 14:06:25 +0200 | [diff] [blame] | 940 | }; |
| 941 | |
| 942 | static struct config_item_type os_desc_type = { |
| 943 | .ct_item_ops = &os_desc_ops, |
| 944 | .ct_attrs = os_desc_attrs, |
| 945 | .ct_owner = THIS_MODULE, |
| 946 | }; |
| 947 | |
Andrzej Pietrasiewicz | 7419485 | 2014-05-08 14:06:28 +0200 | [diff] [blame] | 948 | static inline struct usb_os_desc_ext_prop |
| 949 | *to_usb_os_desc_ext_prop(struct config_item *item) |
| 950 | { |
| 951 | return container_of(item, struct usb_os_desc_ext_prop, item); |
| 952 | } |
| 953 | |
Christoph Hellwig | 45b6a73 | 2015-10-03 15:32:38 +0200 | [diff] [blame] | 954 | static ssize_t ext_prop_type_show(struct config_item *item, char *page) |
Andrzej Pietrasiewicz | 7419485 | 2014-05-08 14:06:28 +0200 | [diff] [blame] | 955 | { |
Christoph Hellwig | 45b6a73 | 2015-10-03 15:32:38 +0200 | [diff] [blame] | 956 | return sprintf(page, "%d", to_usb_os_desc_ext_prop(item)->type); |
Andrzej Pietrasiewicz | 7419485 | 2014-05-08 14:06:28 +0200 | [diff] [blame] | 957 | } |
| 958 | |
Christoph Hellwig | 45b6a73 | 2015-10-03 15:32:38 +0200 | [diff] [blame] | 959 | static ssize_t ext_prop_type_store(struct config_item *item, |
Andrzej Pietrasiewicz | 7419485 | 2014-05-08 14:06:28 +0200 | [diff] [blame] | 960 | const char *page, size_t len) |
| 961 | { |
Christoph Hellwig | 45b6a73 | 2015-10-03 15:32:38 +0200 | [diff] [blame] | 962 | struct usb_os_desc_ext_prop *ext_prop = to_usb_os_desc_ext_prop(item); |
Andrzej Pietrasiewicz | 7419485 | 2014-05-08 14:06:28 +0200 | [diff] [blame] | 963 | struct usb_os_desc *desc = to_usb_os_desc(ext_prop->item.ci_parent); |
| 964 | u8 type; |
| 965 | int ret; |
| 966 | |
| 967 | if (desc->opts_mutex) |
| 968 | mutex_lock(desc->opts_mutex); |
| 969 | ret = kstrtou8(page, 0, &type); |
| 970 | if (ret) |
| 971 | goto end; |
| 972 | if (type < USB_EXT_PROP_UNICODE || type > USB_EXT_PROP_UNICODE_MULTI) { |
| 973 | ret = -EINVAL; |
| 974 | goto end; |
| 975 | } |
| 976 | |
| 977 | if ((ext_prop->type == USB_EXT_PROP_BINARY || |
| 978 | ext_prop->type == USB_EXT_PROP_LE32 || |
| 979 | ext_prop->type == USB_EXT_PROP_BE32) && |
| 980 | (type == USB_EXT_PROP_UNICODE || |
| 981 | type == USB_EXT_PROP_UNICODE_ENV || |
| 982 | type == USB_EXT_PROP_UNICODE_LINK)) |
| 983 | ext_prop->data_len <<= 1; |
| 984 | else if ((ext_prop->type == USB_EXT_PROP_UNICODE || |
| 985 | ext_prop->type == USB_EXT_PROP_UNICODE_ENV || |
| 986 | ext_prop->type == USB_EXT_PROP_UNICODE_LINK) && |
| 987 | (type == USB_EXT_PROP_BINARY || |
| 988 | type == USB_EXT_PROP_LE32 || |
| 989 | type == USB_EXT_PROP_BE32)) |
| 990 | ext_prop->data_len >>= 1; |
| 991 | ext_prop->type = type; |
| 992 | ret = len; |
| 993 | |
| 994 | end: |
| 995 | if (desc->opts_mutex) |
| 996 | mutex_unlock(desc->opts_mutex); |
| 997 | return ret; |
| 998 | } |
| 999 | |
Christoph Hellwig | 45b6a73 | 2015-10-03 15:32:38 +0200 | [diff] [blame] | 1000 | static ssize_t ext_prop_data_show(struct config_item *item, char *page) |
Andrzej Pietrasiewicz | 7419485 | 2014-05-08 14:06:28 +0200 | [diff] [blame] | 1001 | { |
Christoph Hellwig | 45b6a73 | 2015-10-03 15:32:38 +0200 | [diff] [blame] | 1002 | struct usb_os_desc_ext_prop *ext_prop = to_usb_os_desc_ext_prop(item); |
Andrzej Pietrasiewicz | 7419485 | 2014-05-08 14:06:28 +0200 | [diff] [blame] | 1003 | int len = ext_prop->data_len; |
| 1004 | |
| 1005 | if (ext_prop->type == USB_EXT_PROP_UNICODE || |
| 1006 | ext_prop->type == USB_EXT_PROP_UNICODE_ENV || |
| 1007 | ext_prop->type == USB_EXT_PROP_UNICODE_LINK) |
| 1008 | len >>= 1; |
| 1009 | memcpy(page, ext_prop->data, len); |
| 1010 | |
| 1011 | return len; |
| 1012 | } |
| 1013 | |
Christoph Hellwig | 45b6a73 | 2015-10-03 15:32:38 +0200 | [diff] [blame] | 1014 | static ssize_t ext_prop_data_store(struct config_item *item, |
Andrzej Pietrasiewicz | 7419485 | 2014-05-08 14:06:28 +0200 | [diff] [blame] | 1015 | const char *page, size_t len) |
| 1016 | { |
Christoph Hellwig | 45b6a73 | 2015-10-03 15:32:38 +0200 | [diff] [blame] | 1017 | struct usb_os_desc_ext_prop *ext_prop = to_usb_os_desc_ext_prop(item); |
Andrzej Pietrasiewicz | 7419485 | 2014-05-08 14:06:28 +0200 | [diff] [blame] | 1018 | struct usb_os_desc *desc = to_usb_os_desc(ext_prop->item.ci_parent); |
| 1019 | char *new_data; |
| 1020 | size_t ret_len = len; |
| 1021 | |
| 1022 | if (page[len - 1] == '\n' || page[len - 1] == '\0') |
| 1023 | --len; |
Benoit Taine | 58b949e | 2014-05-26 17:21:20 +0200 | [diff] [blame] | 1024 | new_data = kmemdup(page, len, GFP_KERNEL); |
Andrzej Pietrasiewicz | 7419485 | 2014-05-08 14:06:28 +0200 | [diff] [blame] | 1025 | if (!new_data) |
| 1026 | return -ENOMEM; |
| 1027 | |
Andrzej Pietrasiewicz | 7419485 | 2014-05-08 14:06:28 +0200 | [diff] [blame] | 1028 | if (desc->opts_mutex) |
| 1029 | mutex_lock(desc->opts_mutex); |
| 1030 | kfree(ext_prop->data); |
| 1031 | ext_prop->data = new_data; |
| 1032 | desc->ext_prop_len -= ext_prop->data_len; |
| 1033 | ext_prop->data_len = len; |
| 1034 | desc->ext_prop_len += ext_prop->data_len; |
| 1035 | if (ext_prop->type == USB_EXT_PROP_UNICODE || |
| 1036 | ext_prop->type == USB_EXT_PROP_UNICODE_ENV || |
| 1037 | ext_prop->type == USB_EXT_PROP_UNICODE_LINK) { |
| 1038 | desc->ext_prop_len -= ext_prop->data_len; |
| 1039 | ext_prop->data_len <<= 1; |
| 1040 | ext_prop->data_len += 2; |
| 1041 | desc->ext_prop_len += ext_prop->data_len; |
| 1042 | } |
| 1043 | if (desc->opts_mutex) |
| 1044 | mutex_unlock(desc->opts_mutex); |
| 1045 | return ret_len; |
| 1046 | } |
| 1047 | |
Christoph Hellwig | 45b6a73 | 2015-10-03 15:32:38 +0200 | [diff] [blame] | 1048 | CONFIGFS_ATTR(ext_prop_, type); |
| 1049 | CONFIGFS_ATTR(ext_prop_, data); |
Andrzej Pietrasiewicz | 7419485 | 2014-05-08 14:06:28 +0200 | [diff] [blame] | 1050 | |
| 1051 | static struct configfs_attribute *ext_prop_attrs[] = { |
Christoph Hellwig | 45b6a73 | 2015-10-03 15:32:38 +0200 | [diff] [blame] | 1052 | &ext_prop_attr_type, |
| 1053 | &ext_prop_attr_data, |
Andrzej Pietrasiewicz | 7419485 | 2014-05-08 14:06:28 +0200 | [diff] [blame] | 1054 | NULL, |
| 1055 | }; |
| 1056 | |
| 1057 | static void usb_os_desc_ext_prop_release(struct config_item *item) |
| 1058 | { |
| 1059 | struct usb_os_desc_ext_prop *ext_prop = to_usb_os_desc_ext_prop(item); |
| 1060 | |
| 1061 | kfree(ext_prop); /* frees a whole chunk */ |
| 1062 | } |
| 1063 | |
| 1064 | static struct configfs_item_operations ext_prop_ops = { |
| 1065 | .release = usb_os_desc_ext_prop_release, |
Andrzej Pietrasiewicz | 7419485 | 2014-05-08 14:06:28 +0200 | [diff] [blame] | 1066 | }; |
| 1067 | |
| 1068 | static struct config_item *ext_prop_make( |
| 1069 | struct config_group *group, |
| 1070 | const char *name) |
| 1071 | { |
| 1072 | struct usb_os_desc_ext_prop *ext_prop; |
| 1073 | struct config_item_type *ext_prop_type; |
| 1074 | struct usb_os_desc *desc; |
| 1075 | char *vlabuf; |
| 1076 | |
| 1077 | vla_group(data_chunk); |
| 1078 | vla_item(data_chunk, struct usb_os_desc_ext_prop, ext_prop, 1); |
| 1079 | vla_item(data_chunk, struct config_item_type, ext_prop_type, 1); |
| 1080 | |
| 1081 | vlabuf = kzalloc(vla_group_size(data_chunk), GFP_KERNEL); |
| 1082 | if (!vlabuf) |
| 1083 | return ERR_PTR(-ENOMEM); |
| 1084 | |
| 1085 | ext_prop = vla_ptr(vlabuf, data_chunk, ext_prop); |
| 1086 | ext_prop_type = vla_ptr(vlabuf, data_chunk, ext_prop_type); |
| 1087 | |
| 1088 | desc = container_of(group, struct usb_os_desc, group); |
| 1089 | ext_prop_type->ct_item_ops = &ext_prop_ops; |
| 1090 | ext_prop_type->ct_attrs = ext_prop_attrs; |
| 1091 | ext_prop_type->ct_owner = desc->owner; |
| 1092 | |
| 1093 | config_item_init_type_name(&ext_prop->item, name, ext_prop_type); |
| 1094 | |
| 1095 | ext_prop->name = kstrdup(name, GFP_KERNEL); |
| 1096 | if (!ext_prop->name) { |
| 1097 | kfree(vlabuf); |
| 1098 | return ERR_PTR(-ENOMEM); |
| 1099 | } |
| 1100 | desc->ext_prop_len += 14; |
| 1101 | ext_prop->name_len = 2 * strlen(ext_prop->name) + 2; |
| 1102 | if (desc->opts_mutex) |
| 1103 | mutex_lock(desc->opts_mutex); |
| 1104 | desc->ext_prop_len += ext_prop->name_len; |
| 1105 | list_add_tail(&ext_prop->entry, &desc->ext_prop); |
| 1106 | ++desc->ext_prop_count; |
| 1107 | if (desc->opts_mutex) |
| 1108 | mutex_unlock(desc->opts_mutex); |
| 1109 | |
| 1110 | return &ext_prop->item; |
| 1111 | } |
| 1112 | |
| 1113 | static void ext_prop_drop(struct config_group *group, struct config_item *item) |
| 1114 | { |
| 1115 | struct usb_os_desc_ext_prop *ext_prop = to_usb_os_desc_ext_prop(item); |
| 1116 | struct usb_os_desc *desc = to_usb_os_desc(&group->cg_item); |
| 1117 | |
| 1118 | if (desc->opts_mutex) |
| 1119 | mutex_lock(desc->opts_mutex); |
| 1120 | list_del(&ext_prop->entry); |
| 1121 | --desc->ext_prop_count; |
| 1122 | kfree(ext_prop->name); |
| 1123 | desc->ext_prop_len -= (ext_prop->name_len + ext_prop->data_len + 14); |
| 1124 | if (desc->opts_mutex) |
| 1125 | mutex_unlock(desc->opts_mutex); |
| 1126 | config_item_put(item); |
| 1127 | } |
| 1128 | |
| 1129 | static struct configfs_group_operations interf_grp_ops = { |
| 1130 | .make_item = &ext_prop_make, |
| 1131 | .drop_item = &ext_prop_drop, |
| 1132 | }; |
| 1133 | |
Christoph Hellwig | 45b6a73 | 2015-10-03 15:32:38 +0200 | [diff] [blame] | 1134 | static ssize_t interf_grp_compatible_id_show(struct config_item *item, |
Andrzej Pietrasiewicz | fe00b13 | 2014-06-18 14:24:48 +0200 | [diff] [blame] | 1135 | char *page) |
Andrzej Pietrasiewicz | da42431 | 2014-05-08 14:06:26 +0200 | [diff] [blame] | 1136 | { |
Christoph Hellwig | 45b6a73 | 2015-10-03 15:32:38 +0200 | [diff] [blame] | 1137 | memcpy(page, to_usb_os_desc(item)->ext_compat_id, 8); |
Andrzej Pietrasiewicz | da42431 | 2014-05-08 14:06:26 +0200 | [diff] [blame] | 1138 | return 8; |
| 1139 | } |
| 1140 | |
Christoph Hellwig | 45b6a73 | 2015-10-03 15:32:38 +0200 | [diff] [blame] | 1141 | static ssize_t interf_grp_compatible_id_store(struct config_item *item, |
Andrzej Pietrasiewicz | fe00b13 | 2014-06-18 14:24:48 +0200 | [diff] [blame] | 1142 | const char *page, size_t len) |
Andrzej Pietrasiewicz | da42431 | 2014-05-08 14:06:26 +0200 | [diff] [blame] | 1143 | { |
Christoph Hellwig | 45b6a73 | 2015-10-03 15:32:38 +0200 | [diff] [blame] | 1144 | struct usb_os_desc *desc = to_usb_os_desc(item); |
Andrzej Pietrasiewicz | da42431 | 2014-05-08 14:06:26 +0200 | [diff] [blame] | 1145 | int l; |
| 1146 | |
| 1147 | l = min_t(int, 8, len); |
| 1148 | if (page[l - 1] == '\n') |
| 1149 | --l; |
| 1150 | if (desc->opts_mutex) |
| 1151 | mutex_lock(desc->opts_mutex); |
| 1152 | memcpy(desc->ext_compat_id, page, l); |
Andrzej Pietrasiewicz | da42431 | 2014-05-08 14:06:26 +0200 | [diff] [blame] | 1153 | |
| 1154 | if (desc->opts_mutex) |
| 1155 | mutex_unlock(desc->opts_mutex); |
| 1156 | |
| 1157 | return len; |
| 1158 | } |
| 1159 | |
Christoph Hellwig | 45b6a73 | 2015-10-03 15:32:38 +0200 | [diff] [blame] | 1160 | static ssize_t interf_grp_sub_compatible_id_show(struct config_item *item, |
Andrzej Pietrasiewicz | fe00b13 | 2014-06-18 14:24:48 +0200 | [diff] [blame] | 1161 | char *page) |
Andrzej Pietrasiewicz | da42431 | 2014-05-08 14:06:26 +0200 | [diff] [blame] | 1162 | { |
Christoph Hellwig | 45b6a73 | 2015-10-03 15:32:38 +0200 | [diff] [blame] | 1163 | memcpy(page, to_usb_os_desc(item)->ext_compat_id + 8, 8); |
Andrzej Pietrasiewicz | da42431 | 2014-05-08 14:06:26 +0200 | [diff] [blame] | 1164 | return 8; |
| 1165 | } |
| 1166 | |
Christoph Hellwig | 45b6a73 | 2015-10-03 15:32:38 +0200 | [diff] [blame] | 1167 | static ssize_t interf_grp_sub_compatible_id_store(struct config_item *item, |
Andrzej Pietrasiewicz | fe00b13 | 2014-06-18 14:24:48 +0200 | [diff] [blame] | 1168 | const char *page, size_t len) |
Andrzej Pietrasiewicz | da42431 | 2014-05-08 14:06:26 +0200 | [diff] [blame] | 1169 | { |
Christoph Hellwig | 45b6a73 | 2015-10-03 15:32:38 +0200 | [diff] [blame] | 1170 | struct usb_os_desc *desc = to_usb_os_desc(item); |
Andrzej Pietrasiewicz | da42431 | 2014-05-08 14:06:26 +0200 | [diff] [blame] | 1171 | int l; |
| 1172 | |
| 1173 | l = min_t(int, 8, len); |
| 1174 | if (page[l - 1] == '\n') |
| 1175 | --l; |
| 1176 | if (desc->opts_mutex) |
| 1177 | mutex_lock(desc->opts_mutex); |
| 1178 | memcpy(desc->ext_compat_id + 8, page, l); |
Andrzej Pietrasiewicz | da42431 | 2014-05-08 14:06:26 +0200 | [diff] [blame] | 1179 | |
| 1180 | if (desc->opts_mutex) |
| 1181 | mutex_unlock(desc->opts_mutex); |
| 1182 | |
| 1183 | return len; |
| 1184 | } |
| 1185 | |
Christoph Hellwig | 45b6a73 | 2015-10-03 15:32:38 +0200 | [diff] [blame] | 1186 | CONFIGFS_ATTR(interf_grp_, compatible_id); |
| 1187 | CONFIGFS_ATTR(interf_grp_, sub_compatible_id); |
Andrzej Pietrasiewicz | da42431 | 2014-05-08 14:06:26 +0200 | [diff] [blame] | 1188 | |
| 1189 | static struct configfs_attribute *interf_grp_attrs[] = { |
Christoph Hellwig | 45b6a73 | 2015-10-03 15:32:38 +0200 | [diff] [blame] | 1190 | &interf_grp_attr_compatible_id, |
| 1191 | &interf_grp_attr_sub_compatible_id, |
Andrzej Pietrasiewicz | da42431 | 2014-05-08 14:06:26 +0200 | [diff] [blame] | 1192 | NULL |
| 1193 | }; |
| 1194 | |
Andrew Gabbasov | 3c57f9d | 2017-09-30 08:54:52 -0700 | [diff] [blame] | 1195 | struct config_group *usb_os_desc_prepare_interf_dir( |
| 1196 | struct config_group *parent, |
| 1197 | int n_interf, |
| 1198 | struct usb_os_desc **desc, |
| 1199 | char **names, |
| 1200 | struct module *owner) |
Andrzej Pietrasiewicz | da42431 | 2014-05-08 14:06:26 +0200 | [diff] [blame] | 1201 | { |
Christoph Hellwig | 1ae1602 | 2016-02-26 11:02:14 +0100 | [diff] [blame] | 1202 | struct config_group *os_desc_group; |
Andrzej Pietrasiewicz | da42431 | 2014-05-08 14:06:26 +0200 | [diff] [blame] | 1203 | struct config_item_type *os_desc_type, *interface_type; |
| 1204 | |
| 1205 | vla_group(data_chunk); |
Andrzej Pietrasiewicz | da42431 | 2014-05-08 14:06:26 +0200 | [diff] [blame] | 1206 | vla_item(data_chunk, struct config_group, os_desc_group, 1); |
Andrzej Pietrasiewicz | da42431 | 2014-05-08 14:06:26 +0200 | [diff] [blame] | 1207 | vla_item(data_chunk, struct config_item_type, os_desc_type, 1); |
| 1208 | vla_item(data_chunk, struct config_item_type, interface_type, 1); |
| 1209 | |
| 1210 | char *vlabuf = kzalloc(vla_group_size(data_chunk), GFP_KERNEL); |
| 1211 | if (!vlabuf) |
Andrew Gabbasov | 3c57f9d | 2017-09-30 08:54:52 -0700 | [diff] [blame] | 1212 | return ERR_PTR(-ENOMEM); |
Andrzej Pietrasiewicz | da42431 | 2014-05-08 14:06:26 +0200 | [diff] [blame] | 1213 | |
Andrzej Pietrasiewicz | da42431 | 2014-05-08 14:06:26 +0200 | [diff] [blame] | 1214 | os_desc_group = vla_ptr(vlabuf, data_chunk, os_desc_group); |
| 1215 | os_desc_type = vla_ptr(vlabuf, data_chunk, os_desc_type); |
Andrzej Pietrasiewicz | da42431 | 2014-05-08 14:06:26 +0200 | [diff] [blame] | 1216 | interface_type = vla_ptr(vlabuf, data_chunk, interface_type); |
| 1217 | |
Andrzej Pietrasiewicz | da42431 | 2014-05-08 14:06:26 +0200 | [diff] [blame] | 1218 | os_desc_type->ct_owner = owner; |
| 1219 | config_group_init_type_name(os_desc_group, "os_desc", os_desc_type); |
Christoph Hellwig | 1ae1602 | 2016-02-26 11:02:14 +0100 | [diff] [blame] | 1220 | configfs_add_default_group(os_desc_group, parent); |
Andrzej Pietrasiewicz | da42431 | 2014-05-08 14:06:26 +0200 | [diff] [blame] | 1221 | |
Andrzej Pietrasiewicz | 7419485 | 2014-05-08 14:06:28 +0200 | [diff] [blame] | 1222 | interface_type->ct_group_ops = &interf_grp_ops; |
Andrzej Pietrasiewicz | da42431 | 2014-05-08 14:06:26 +0200 | [diff] [blame] | 1223 | interface_type->ct_attrs = interf_grp_attrs; |
| 1224 | interface_type->ct_owner = owner; |
| 1225 | |
| 1226 | while (n_interf--) { |
| 1227 | struct usb_os_desc *d; |
| 1228 | |
| 1229 | d = desc[n_interf]; |
Andrzej Pietrasiewicz | 7419485 | 2014-05-08 14:06:28 +0200 | [diff] [blame] | 1230 | d->owner = owner; |
Andrzej Pietrasiewicz | da42431 | 2014-05-08 14:06:26 +0200 | [diff] [blame] | 1231 | config_group_init_type_name(&d->group, "", interface_type); |
Andrzej Pietrasiewicz | 14574b5 | 2014-06-18 14:24:49 +0200 | [diff] [blame] | 1232 | config_item_set_name(&d->group.cg_item, "interface.%s", |
| 1233 | names[n_interf]); |
Christoph Hellwig | 1ae1602 | 2016-02-26 11:02:14 +0100 | [diff] [blame] | 1234 | configfs_add_default_group(&d->group, os_desc_group); |
Andrzej Pietrasiewicz | da42431 | 2014-05-08 14:06:26 +0200 | [diff] [blame] | 1235 | } |
| 1236 | |
Andrew Gabbasov | 3c57f9d | 2017-09-30 08:54:52 -0700 | [diff] [blame] | 1237 | return os_desc_group; |
Andrzej Pietrasiewicz | da42431 | 2014-05-08 14:06:26 +0200 | [diff] [blame] | 1238 | } |
| 1239 | EXPORT_SYMBOL(usb_os_desc_prepare_interf_dir); |
| 1240 | |
Sebastian Andrzej Siewior | 88af8bb | 2012-12-23 21:10:24 +0100 | [diff] [blame] | 1241 | static int configfs_do_nothing(struct usb_composite_dev *cdev) |
| 1242 | { |
David Rientjes | 75bfe23 | 2013-04-07 14:11:47 -0700 | [diff] [blame] | 1243 | WARN_ON(1); |
Sebastian Andrzej Siewior | 88af8bb | 2012-12-23 21:10:24 +0100 | [diff] [blame] | 1244 | return -EINVAL; |
| 1245 | } |
| 1246 | |
| 1247 | int composite_dev_prepare(struct usb_composite_driver *composite, |
| 1248 | struct usb_composite_dev *dev); |
| 1249 | |
Andrzej Pietrasiewicz | da42431 | 2014-05-08 14:06:26 +0200 | [diff] [blame] | 1250 | int composite_os_desc_req_prepare(struct usb_composite_dev *cdev, |
| 1251 | struct usb_ep *ep0); |
| 1252 | |
Sebastian Andrzej Siewior | 88af8bb | 2012-12-23 21:10:24 +0100 | [diff] [blame] | 1253 | static void purge_configs_funcs(struct gadget_info *gi) |
| 1254 | { |
| 1255 | struct usb_configuration *c; |
| 1256 | |
| 1257 | list_for_each_entry(c, &gi->cdev.configs, list) { |
| 1258 | struct usb_function *f, *tmp; |
| 1259 | struct config_usb_cfg *cfg; |
| 1260 | |
| 1261 | cfg = container_of(c, struct config_usb_cfg, c); |
| 1262 | |
Chandana Kishori Chiluveru | a1bd87c | 2018-06-18 17:23:18 +0530 | [diff] [blame] | 1263 | list_for_each_entry_safe_reverse(f, tmp, &c->functions, list) { |
Sebastian Andrzej Siewior | 88af8bb | 2012-12-23 21:10:24 +0100 | [diff] [blame] | 1264 | |
Chandana Kishori Chiluveru | a1bd87c | 2018-06-18 17:23:18 +0530 | [diff] [blame] | 1265 | list_move(&f->list, &cfg->func_list); |
Sebastian Andrzej Siewior | 88af8bb | 2012-12-23 21:10:24 +0100 | [diff] [blame] | 1266 | if (f->unbind) { |
Romain Izard | da7b895 | 2016-08-29 12:22:29 +0300 | [diff] [blame] | 1267 | dev_dbg(&gi->cdev.gadget->dev, |
Chandana Kishori Chiluveru | 7f5670a | 2017-10-28 23:05:45 +0530 | [diff] [blame] | 1268 | "unbind function '%s'/%pK\n", |
Romain Izard | a08f5db | 2016-07-26 18:21:46 +0200 | [diff] [blame] | 1269 | f->name, f); |
Sebastian Andrzej Siewior | 88af8bb | 2012-12-23 21:10:24 +0100 | [diff] [blame] | 1270 | f->unbind(c, f); |
| 1271 | } |
| 1272 | } |
| 1273 | c->next_interface_id = 0; |
Krzysztof Opasiak | 903124f | 2015-03-20 15:48:56 +0100 | [diff] [blame] | 1274 | memset(c->interface, 0, sizeof(c->interface)); |
John Youn | 554eead | 2016-02-05 17:06:35 -0800 | [diff] [blame] | 1275 | c->superspeed_plus = 0; |
Sebastian Andrzej Siewior | 88af8bb | 2012-12-23 21:10:24 +0100 | [diff] [blame] | 1276 | c->superspeed = 0; |
| 1277 | c->highspeed = 0; |
| 1278 | c->fullspeed = 0; |
| 1279 | } |
| 1280 | } |
| 1281 | |
| 1282 | static int configfs_composite_bind(struct usb_gadget *gadget, |
| 1283 | struct usb_gadget_driver *gdriver) |
| 1284 | { |
| 1285 | struct usb_composite_driver *composite = to_cdriver(gdriver); |
| 1286 | struct gadget_info *gi = container_of(composite, |
| 1287 | struct gadget_info, composite); |
| 1288 | struct usb_composite_dev *cdev = &gi->cdev; |
| 1289 | struct usb_configuration *c; |
| 1290 | struct usb_string *s; |
| 1291 | unsigned i; |
| 1292 | int ret; |
| 1293 | |
| 1294 | /* the gi->lock is hold by the caller */ |
Peter Chen | aa919ef | 2019-08-26 15:10:55 -0400 | [diff] [blame] | 1295 | gi->unbind = 0; |
Sebastian Andrzej Siewior | 88af8bb | 2012-12-23 21:10:24 +0100 | [diff] [blame] | 1296 | cdev->gadget = gadget; |
| 1297 | set_gadget_data(gadget, cdev); |
| 1298 | ret = composite_dev_prepare(composite, cdev); |
| 1299 | if (ret) |
| 1300 | return ret; |
| 1301 | /* and now the gadget bind */ |
| 1302 | ret = -EINVAL; |
| 1303 | |
| 1304 | if (list_empty(&gi->cdev.configs)) { |
Peter Chen | 4d9f872 | 2014-05-05 07:39:34 +0800 | [diff] [blame] | 1305 | pr_err("Need at least one configuration in %s.\n", |
Sebastian Andrzej Siewior | 88af8bb | 2012-12-23 21:10:24 +0100 | [diff] [blame] | 1306 | gi->composite.name); |
| 1307 | goto err_comp_cleanup; |
| 1308 | } |
| 1309 | |
| 1310 | |
| 1311 | list_for_each_entry(c, &gi->cdev.configs, list) { |
| 1312 | struct config_usb_cfg *cfg; |
| 1313 | |
| 1314 | cfg = container_of(c, struct config_usb_cfg, c); |
| 1315 | if (list_empty(&cfg->func_list)) { |
Peter Chen | 4d9f872 | 2014-05-05 07:39:34 +0800 | [diff] [blame] | 1316 | pr_err("Config %s/%d of %s needs at least one function.\n", |
Sebastian Andrzej Siewior | 88af8bb | 2012-12-23 21:10:24 +0100 | [diff] [blame] | 1317 | c->label, c->bConfigurationValue, |
| 1318 | gi->composite.name); |
| 1319 | goto err_comp_cleanup; |
| 1320 | } |
| 1321 | } |
| 1322 | |
| 1323 | /* init all strings */ |
| 1324 | if (!list_empty(&gi->string_list)) { |
| 1325 | struct gadget_strings *gs; |
| 1326 | |
| 1327 | i = 0; |
| 1328 | list_for_each_entry(gs, &gi->string_list, list) { |
| 1329 | |
| 1330 | gi->gstrings[i] = &gs->stringtab_dev; |
| 1331 | gs->stringtab_dev.strings = gs->strings; |
| 1332 | gs->strings[USB_GADGET_MANUFACTURER_IDX].s = |
| 1333 | gs->manufacturer; |
| 1334 | gs->strings[USB_GADGET_PRODUCT_IDX].s = gs->product; |
| 1335 | gs->strings[USB_GADGET_SERIAL_IDX].s = gs->serialnumber; |
| 1336 | i++; |
| 1337 | } |
| 1338 | gi->gstrings[i] = NULL; |
| 1339 | s = usb_gstrings_attach(&gi->cdev, gi->gstrings, |
| 1340 | USB_GADGET_FIRST_AVAIL_IDX); |
Wei Yongjun | fea7707 | 2013-05-07 19:50:31 +0800 | [diff] [blame] | 1341 | if (IS_ERR(s)) { |
| 1342 | ret = PTR_ERR(s); |
Sebastian Andrzej Siewior | 88af8bb | 2012-12-23 21:10:24 +0100 | [diff] [blame] | 1343 | goto err_comp_cleanup; |
Wei Yongjun | fea7707 | 2013-05-07 19:50:31 +0800 | [diff] [blame] | 1344 | } |
Sebastian Andrzej Siewior | 88af8bb | 2012-12-23 21:10:24 +0100 | [diff] [blame] | 1345 | |
| 1346 | gi->cdev.desc.iManufacturer = s[USB_GADGET_MANUFACTURER_IDX].id; |
| 1347 | gi->cdev.desc.iProduct = s[USB_GADGET_PRODUCT_IDX].id; |
| 1348 | gi->cdev.desc.iSerialNumber = s[USB_GADGET_SERIAL_IDX].id; |
| 1349 | } |
| 1350 | |
Andrzej Pietrasiewicz | 87213d3 | 2014-05-08 14:06:25 +0200 | [diff] [blame] | 1351 | if (gi->use_os_desc) { |
| 1352 | cdev->use_os_string = true; |
| 1353 | cdev->b_vendor_code = gi->b_vendor_code; |
| 1354 | memcpy(cdev->qw_sign, gi->qw_sign, OS_STRING_QW_SIGN_LEN); |
| 1355 | } |
| 1356 | |
Li Jun | 41ce84c | 2015-07-09 15:18:48 +0800 | [diff] [blame] | 1357 | if (gadget_is_otg(gadget) && !otg_desc[0]) { |
| 1358 | struct usb_descriptor_header *usb_desc; |
| 1359 | |
| 1360 | usb_desc = usb_otg_descriptor_alloc(gadget); |
| 1361 | if (!usb_desc) { |
| 1362 | ret = -ENOMEM; |
| 1363 | goto err_comp_cleanup; |
| 1364 | } |
| 1365 | usb_otg_descriptor_init(gadget, usb_desc); |
| 1366 | otg_desc[0] = usb_desc; |
| 1367 | otg_desc[1] = NULL; |
| 1368 | } |
| 1369 | |
Sebastian Andrzej Siewior | 88af8bb | 2012-12-23 21:10:24 +0100 | [diff] [blame] | 1370 | /* Go through all configs, attach all functions */ |
| 1371 | list_for_each_entry(c, &gi->cdev.configs, list) { |
| 1372 | struct config_usb_cfg *cfg; |
| 1373 | struct usb_function *f; |
| 1374 | struct usb_function *tmp; |
| 1375 | struct gadget_config_name *cn; |
| 1376 | |
Li Jun | 41ce84c | 2015-07-09 15:18:48 +0800 | [diff] [blame] | 1377 | if (gadget_is_otg(gadget)) |
| 1378 | c->descriptors = otg_desc; |
| 1379 | |
Sebastian Andrzej Siewior | 88af8bb | 2012-12-23 21:10:24 +0100 | [diff] [blame] | 1380 | cfg = container_of(c, struct config_usb_cfg, c); |
| 1381 | if (!list_empty(&cfg->string_list)) { |
| 1382 | i = 0; |
| 1383 | list_for_each_entry(cn, &cfg->string_list, list) { |
| 1384 | cfg->gstrings[i] = &cn->stringtab_dev; |
| 1385 | cn->stringtab_dev.strings = &cn->strings; |
| 1386 | cn->strings.s = cn->configuration; |
| 1387 | i++; |
| 1388 | } |
| 1389 | cfg->gstrings[i] = NULL; |
| 1390 | s = usb_gstrings_attach(&gi->cdev, cfg->gstrings, 1); |
Wei Yongjun | fea7707 | 2013-05-07 19:50:31 +0800 | [diff] [blame] | 1391 | if (IS_ERR(s)) { |
| 1392 | ret = PTR_ERR(s); |
Sebastian Andrzej Siewior | 88af8bb | 2012-12-23 21:10:24 +0100 | [diff] [blame] | 1393 | goto err_comp_cleanup; |
Wei Yongjun | fea7707 | 2013-05-07 19:50:31 +0800 | [diff] [blame] | 1394 | } |
Sebastian Andrzej Siewior | 88af8bb | 2012-12-23 21:10:24 +0100 | [diff] [blame] | 1395 | c->iConfiguration = s[0].id; |
| 1396 | } |
| 1397 | |
| 1398 | list_for_each_entry_safe(f, tmp, &cfg->func_list, list) { |
| 1399 | list_del(&f->list); |
| 1400 | ret = usb_add_function(c, f); |
Andrzej Pietrasiewicz | 5a68e9b | 2013-08-08 09:43:28 +0200 | [diff] [blame] | 1401 | if (ret) { |
| 1402 | list_add(&f->list, &cfg->func_list); |
Sebastian Andrzej Siewior | 88af8bb | 2012-12-23 21:10:24 +0100 | [diff] [blame] | 1403 | goto err_purge_funcs; |
Andrzej Pietrasiewicz | 5a68e9b | 2013-08-08 09:43:28 +0200 | [diff] [blame] | 1404 | } |
Sebastian Andrzej Siewior | 88af8bb | 2012-12-23 21:10:24 +0100 | [diff] [blame] | 1405 | } |
| 1406 | usb_ep_autoconfig_reset(cdev->gadget); |
| 1407 | } |
Andrzej Pietrasiewicz | da42431 | 2014-05-08 14:06:26 +0200 | [diff] [blame] | 1408 | if (cdev->use_os_string) { |
| 1409 | ret = composite_os_desc_req_prepare(cdev, gadget->ep0); |
| 1410 | if (ret) |
| 1411 | goto err_purge_funcs; |
| 1412 | } |
| 1413 | |
Sebastian Andrzej Siewior | 88af8bb | 2012-12-23 21:10:24 +0100 | [diff] [blame] | 1414 | usb_ep_autoconfig_reset(cdev->gadget); |
| 1415 | return 0; |
| 1416 | |
| 1417 | err_purge_funcs: |
| 1418 | purge_configs_funcs(gi); |
| 1419 | err_comp_cleanup: |
| 1420 | composite_dev_cleanup(cdev); |
| 1421 | return ret; |
| 1422 | } |
| 1423 | |
Badhri Jagan Sridharan | 1c3865d | 2014-12-15 10:44:47 -0800 | [diff] [blame] | 1424 | #ifdef CONFIG_USB_CONFIGFS_UEVENT |
| 1425 | static void android_work(struct work_struct *data) |
| 1426 | { |
| 1427 | struct gadget_info *gi = container_of(data, struct gadget_info, work); |
| 1428 | struct usb_composite_dev *cdev = &gi->cdev; |
| 1429 | char *disconnected[2] = { "USB_STATE=DISCONNECTED", NULL }; |
| 1430 | char *connected[2] = { "USB_STATE=CONNECTED", NULL }; |
| 1431 | char *configured[2] = { "USB_STATE=CONFIGURED", NULL }; |
| 1432 | /* 0-connected 1-configured 2-disconnected*/ |
| 1433 | bool status[3] = { false, false, false }; |
| 1434 | unsigned long flags; |
| 1435 | bool uevent_sent = false; |
| 1436 | |
| 1437 | spin_lock_irqsave(&cdev->lock, flags); |
| 1438 | if (cdev->config) |
| 1439 | status[1] = true; |
| 1440 | |
| 1441 | if (gi->connected != gi->sw_connected) { |
| 1442 | if (gi->connected) |
| 1443 | status[0] = true; |
| 1444 | else |
| 1445 | status[2] = true; |
| 1446 | gi->sw_connected = gi->connected; |
| 1447 | } |
| 1448 | spin_unlock_irqrestore(&cdev->lock, flags); |
| 1449 | |
| 1450 | if (status[0]) { |
Ajay Agarwal | fea56da | 2017-05-30 10:27:23 +0530 | [diff] [blame] | 1451 | kobject_uevent_env(&gi->dev->kobj, |
Badhri Jagan Sridharan | 2a387e5 | 2015-03-27 14:15:19 -0700 | [diff] [blame] | 1452 | KOBJ_CHANGE, connected); |
Badhri Jagan Sridharan | 1c3865d | 2014-12-15 10:44:47 -0800 | [diff] [blame] | 1453 | pr_info("%s: sent uevent %s\n", __func__, connected[0]); |
| 1454 | uevent_sent = true; |
| 1455 | } |
| 1456 | |
| 1457 | if (status[1]) { |
Ajay Agarwal | fea56da | 2017-05-30 10:27:23 +0530 | [diff] [blame] | 1458 | kobject_uevent_env(&gi->dev->kobj, |
Badhri Jagan Sridharan | 2a387e5 | 2015-03-27 14:15:19 -0700 | [diff] [blame] | 1459 | KOBJ_CHANGE, configured); |
Badhri Jagan Sridharan | 1c3865d | 2014-12-15 10:44:47 -0800 | [diff] [blame] | 1460 | pr_info("%s: sent uevent %s\n", __func__, configured[0]); |
| 1461 | uevent_sent = true; |
| 1462 | } |
| 1463 | |
| 1464 | if (status[2]) { |
Ajay Agarwal | fea56da | 2017-05-30 10:27:23 +0530 | [diff] [blame] | 1465 | kobject_uevent_env(&gi->dev->kobj, |
Badhri Jagan Sridharan | 2a387e5 | 2015-03-27 14:15:19 -0700 | [diff] [blame] | 1466 | KOBJ_CHANGE, disconnected); |
Badhri Jagan Sridharan | 1c3865d | 2014-12-15 10:44:47 -0800 | [diff] [blame] | 1467 | pr_info("%s: sent uevent %s\n", __func__, disconnected[0]); |
| 1468 | uevent_sent = true; |
| 1469 | } |
| 1470 | |
| 1471 | if (!uevent_sent) { |
Chandana Kishori Chiluveru | 7f5670a | 2017-10-28 23:05:45 +0530 | [diff] [blame] | 1472 | pr_info("%s: did not send uevent (%d %d %pK)\n", __func__, |
Badhri Jagan Sridharan | 1c3865d | 2014-12-15 10:44:47 -0800 | [diff] [blame] | 1473 | gi->connected, gi->sw_connected, cdev->config); |
| 1474 | } |
| 1475 | } |
| 1476 | #endif |
| 1477 | |
Sebastian Andrzej Siewior | 88af8bb | 2012-12-23 21:10:24 +0100 | [diff] [blame] | 1478 | static void configfs_composite_unbind(struct usb_gadget *gadget) |
| 1479 | { |
| 1480 | struct usb_composite_dev *cdev; |
| 1481 | struct gadget_info *gi; |
Peter Chen | aa919ef | 2019-08-26 15:10:55 -0400 | [diff] [blame] | 1482 | unsigned long flags; |
Sebastian Andrzej Siewior | 88af8bb | 2012-12-23 21:10:24 +0100 | [diff] [blame] | 1483 | |
| 1484 | /* the gi->lock is hold by the caller */ |
| 1485 | |
| 1486 | cdev = get_gadget_data(gadget); |
| 1487 | gi = container_of(cdev, struct gadget_info, cdev); |
Peter Chen | aa919ef | 2019-08-26 15:10:55 -0400 | [diff] [blame] | 1488 | spin_lock_irqsave(&gi->spinlock, flags); |
| 1489 | gi->unbind = 1; |
| 1490 | spin_unlock_irqrestore(&gi->spinlock, flags); |
Sebastian Andrzej Siewior | 88af8bb | 2012-12-23 21:10:24 +0100 | [diff] [blame] | 1491 | |
Li Jun | 41ce84c | 2015-07-09 15:18:48 +0800 | [diff] [blame] | 1492 | kfree(otg_desc[0]); |
| 1493 | otg_desc[0] = NULL; |
Sebastian Andrzej Siewior | 88af8bb | 2012-12-23 21:10:24 +0100 | [diff] [blame] | 1494 | purge_configs_funcs(gi); |
| 1495 | composite_dev_cleanup(cdev); |
| 1496 | usb_ep_autoconfig_reset(cdev->gadget); |
Peter Chen | aa919ef | 2019-08-26 15:10:55 -0400 | [diff] [blame] | 1497 | spin_lock_irqsave(&gi->spinlock, flags); |
Sebastian Andrzej Siewior | 88af8bb | 2012-12-23 21:10:24 +0100 | [diff] [blame] | 1498 | cdev->gadget = NULL; |
Vijayavardhan Vennapusa | 07691fc | 2020-05-14 08:52:22 +0530 | [diff] [blame] | 1499 | cdev->deactivations = 0; |
| 1500 | gadget->deactivated = false; |
Sebastian Andrzej Siewior | 88af8bb | 2012-12-23 21:10:24 +0100 | [diff] [blame] | 1501 | set_gadget_data(gadget, NULL); |
Peter Chen | aa919ef | 2019-08-26 15:10:55 -0400 | [diff] [blame] | 1502 | spin_unlock_irqrestore(&gi->spinlock, flags); |
| 1503 | } |
| 1504 | |
jianzhou | 2de4359 | 2019-12-09 10:19:45 +0800 | [diff] [blame] | 1505 | #ifndef CONFIG_USB_CONFIGFS_UEVENT |
Peter Chen | aa919ef | 2019-08-26 15:10:55 -0400 | [diff] [blame] | 1506 | static int configfs_composite_setup(struct usb_gadget *gadget, |
| 1507 | const struct usb_ctrlrequest *ctrl) |
| 1508 | { |
| 1509 | struct usb_composite_dev *cdev; |
| 1510 | struct gadget_info *gi; |
| 1511 | unsigned long flags; |
| 1512 | int ret; |
| 1513 | |
| 1514 | cdev = get_gadget_data(gadget); |
| 1515 | if (!cdev) |
| 1516 | return 0; |
| 1517 | |
| 1518 | gi = container_of(cdev, struct gadget_info, cdev); |
| 1519 | spin_lock_irqsave(&gi->spinlock, flags); |
| 1520 | cdev = get_gadget_data(gadget); |
| 1521 | if (!cdev || gi->unbind) { |
| 1522 | spin_unlock_irqrestore(&gi->spinlock, flags); |
| 1523 | return 0; |
| 1524 | } |
| 1525 | |
| 1526 | ret = composite_setup(gadget, ctrl); |
| 1527 | spin_unlock_irqrestore(&gi->spinlock, flags); |
| 1528 | return ret; |
| 1529 | } |
| 1530 | |
| 1531 | static void configfs_composite_disconnect(struct usb_gadget *gadget) |
| 1532 | { |
| 1533 | struct usb_composite_dev *cdev; |
| 1534 | struct gadget_info *gi; |
| 1535 | unsigned long flags; |
| 1536 | |
| 1537 | cdev = get_gadget_data(gadget); |
| 1538 | if (!cdev) |
| 1539 | return; |
| 1540 | |
| 1541 | gi = container_of(cdev, struct gadget_info, cdev); |
| 1542 | spin_lock_irqsave(&gi->spinlock, flags); |
| 1543 | cdev = get_gadget_data(gadget); |
| 1544 | if (!cdev || gi->unbind) { |
| 1545 | spin_unlock_irqrestore(&gi->spinlock, flags); |
| 1546 | return; |
| 1547 | } |
| 1548 | |
| 1549 | composite_disconnect(gadget); |
| 1550 | spin_unlock_irqrestore(&gi->spinlock, flags); |
| 1551 | } |
jianzhou | 2de4359 | 2019-12-09 10:19:45 +0800 | [diff] [blame] | 1552 | #endif |
Peter Chen | aa919ef | 2019-08-26 15:10:55 -0400 | [diff] [blame] | 1553 | |
| 1554 | static void configfs_composite_suspend(struct usb_gadget *gadget) |
| 1555 | { |
| 1556 | struct usb_composite_dev *cdev; |
| 1557 | struct gadget_info *gi; |
| 1558 | unsigned long flags; |
| 1559 | |
| 1560 | cdev = get_gadget_data(gadget); |
| 1561 | if (!cdev) |
| 1562 | return; |
| 1563 | |
| 1564 | gi = container_of(cdev, struct gadget_info, cdev); |
| 1565 | spin_lock_irqsave(&gi->spinlock, flags); |
| 1566 | cdev = get_gadget_data(gadget); |
| 1567 | if (!cdev || gi->unbind) { |
| 1568 | spin_unlock_irqrestore(&gi->spinlock, flags); |
| 1569 | return; |
| 1570 | } |
| 1571 | |
| 1572 | composite_suspend(gadget); |
| 1573 | spin_unlock_irqrestore(&gi->spinlock, flags); |
| 1574 | } |
| 1575 | |
| 1576 | static void configfs_composite_resume(struct usb_gadget *gadget) |
| 1577 | { |
| 1578 | struct usb_composite_dev *cdev; |
| 1579 | struct gadget_info *gi; |
| 1580 | unsigned long flags; |
| 1581 | |
| 1582 | cdev = get_gadget_data(gadget); |
| 1583 | if (!cdev) |
| 1584 | return; |
| 1585 | |
| 1586 | gi = container_of(cdev, struct gadget_info, cdev); |
| 1587 | spin_lock_irqsave(&gi->spinlock, flags); |
| 1588 | cdev = get_gadget_data(gadget); |
| 1589 | if (!cdev || gi->unbind) { |
| 1590 | spin_unlock_irqrestore(&gi->spinlock, flags); |
| 1591 | return; |
| 1592 | } |
| 1593 | |
| 1594 | composite_resume(gadget); |
| 1595 | spin_unlock_irqrestore(&gi->spinlock, flags); |
Sebastian Andrzej Siewior | 88af8bb | 2012-12-23 21:10:24 +0100 | [diff] [blame] | 1596 | } |
| 1597 | |
Badhri Jagan Sridharan | 1c3865d | 2014-12-15 10:44:47 -0800 | [diff] [blame] | 1598 | #ifdef CONFIG_USB_CONFIGFS_UEVENT |
| 1599 | static int android_setup(struct usb_gadget *gadget, |
| 1600 | const struct usb_ctrlrequest *c) |
| 1601 | { |
| 1602 | struct usb_composite_dev *cdev = get_gadget_data(gadget); |
| 1603 | unsigned long flags; |
| 1604 | struct gadget_info *gi = container_of(cdev, struct gadget_info, cdev); |
| 1605 | int value = -EOPNOTSUPP; |
| 1606 | struct usb_function_instance *fi; |
| 1607 | |
| 1608 | spin_lock_irqsave(&cdev->lock, flags); |
| 1609 | if (!gi->connected) { |
| 1610 | gi->connected = 1; |
| 1611 | schedule_work(&gi->work); |
| 1612 | } |
| 1613 | spin_unlock_irqrestore(&cdev->lock, flags); |
| 1614 | list_for_each_entry(fi, &gi->available_func, cfs_list) { |
| 1615 | if (fi != NULL && fi->f != NULL && fi->f->setup != NULL) { |
| 1616 | value = fi->f->setup(fi->f, c); |
| 1617 | if (value >= 0) |
| 1618 | break; |
| 1619 | } |
| 1620 | } |
| 1621 | |
Ziqi Chen | c35ae88 | 2017-09-26 18:48:28 +0800 | [diff] [blame] | 1622 | #ifdef CONFIG_USB_F_NCM |
| 1623 | if (value < 0) |
| 1624 | value = ncm_ctrlrequest(cdev, c); |
| 1625 | |
| 1626 | /* |
| 1627 | * for mirror link command case, if it already been handled, |
| 1628 | * do not pass to composite_setup |
| 1629 | */ |
| 1630 | if (value == 0) |
| 1631 | return value; |
| 1632 | #endif |
| 1633 | |
Badhri Jagan Sridharan | 1c3865d | 2014-12-15 10:44:47 -0800 | [diff] [blame] | 1634 | #ifdef CONFIG_USB_CONFIGFS_F_ACC |
| 1635 | if (value < 0) |
| 1636 | value = acc_ctrlrequest(cdev, c); |
| 1637 | #endif |
| 1638 | |
| 1639 | if (value < 0) |
| 1640 | value = composite_setup(gadget, c); |
| 1641 | |
| 1642 | spin_lock_irqsave(&cdev->lock, flags); |
| 1643 | if (c->bRequest == USB_REQ_SET_CONFIGURATION && |
| 1644 | cdev->config) { |
| 1645 | schedule_work(&gi->work); |
| 1646 | } |
| 1647 | spin_unlock_irqrestore(&cdev->lock, flags); |
| 1648 | |
| 1649 | return value; |
| 1650 | } |
| 1651 | |
| 1652 | static void android_disconnect(struct usb_gadget *gadget) |
| 1653 | { |
| 1654 | struct usb_composite_dev *cdev = get_gadget_data(gadget); |
Hemant Kumar | cb0304a | 2016-11-01 13:00:57 -0700 | [diff] [blame] | 1655 | struct gadget_info *gi; |
| 1656 | |
| 1657 | if (!cdev) { |
| 1658 | pr_err("%s: gadget is not connected\n", __func__); |
| 1659 | return; |
| 1660 | } |
| 1661 | |
| 1662 | gi = container_of(cdev, struct gadget_info, cdev); |
Badhri Jagan Sridharan | 1c3865d | 2014-12-15 10:44:47 -0800 | [diff] [blame] | 1663 | |
Danilo Krummrich | 6e05535 | 2017-08-14 12:45:38 +0200 | [diff] [blame] | 1664 | /* FIXME: There's a race between usb_gadget_udc_stop() which is likely |
| 1665 | * to set the gadget driver to NULL in the udc driver and this drivers |
| 1666 | * gadget disconnect fn which likely checks for the gadget driver to |
| 1667 | * be a null ptr. It happens that unbind (doing set_gadget_data(NULL)) |
| 1668 | * is called before the gadget driver is set to NULL and the udc driver |
| 1669 | * calls disconnect fn which results in cdev being a null ptr. |
| 1670 | */ |
| 1671 | if (cdev == NULL) { |
| 1672 | WARN(1, "%s: gadget driver already disconnected\n", __func__); |
| 1673 | return; |
| 1674 | } |
| 1675 | |
Badhri Jagan Sridharan | 1c3865d | 2014-12-15 10:44:47 -0800 | [diff] [blame] | 1676 | /* accessory HID support can be active while the |
| 1677 | accessory function is not actually enabled, |
| 1678 | so we need to inform it when we are disconnected. |
| 1679 | */ |
| 1680 | |
| 1681 | #ifdef CONFIG_USB_CONFIGFS_F_ACC |
| 1682 | acc_disconnect(); |
| 1683 | #endif |
| 1684 | gi->connected = 0; |
Vijayavardhan Vennapusa | 4ca835b | 2017-10-30 14:33:51 +0530 | [diff] [blame] | 1685 | if (!gi->unbinding) |
| 1686 | schedule_work(&gi->work); |
Badhri Jagan Sridharan | 1c3865d | 2014-12-15 10:44:47 -0800 | [diff] [blame] | 1687 | composite_disconnect(gadget); |
| 1688 | } |
| 1689 | #endif |
| 1690 | |
Sebastian Andrzej Siewior | 88af8bb | 2012-12-23 21:10:24 +0100 | [diff] [blame] | 1691 | static const struct usb_gadget_driver configfs_driver_template = { |
| 1692 | .bind = configfs_composite_bind, |
| 1693 | .unbind = configfs_composite_unbind, |
Badhri Jagan Sridharan | 1c3865d | 2014-12-15 10:44:47 -0800 | [diff] [blame] | 1694 | #ifdef CONFIG_USB_CONFIGFS_UEVENT |
| 1695 | .setup = android_setup, |
Amit Pundir | c316caf | 2015-10-06 20:53:27 +0530 | [diff] [blame] | 1696 | .reset = android_disconnect, |
Badhri Jagan Sridharan | 1c3865d | 2014-12-15 10:44:47 -0800 | [diff] [blame] | 1697 | .disconnect = android_disconnect, |
| 1698 | #else |
Peter Chen | aa919ef | 2019-08-26 15:10:55 -0400 | [diff] [blame] | 1699 | .setup = configfs_composite_setup, |
| 1700 | .reset = configfs_composite_disconnect, |
| 1701 | .disconnect = configfs_composite_disconnect, |
Badhri Jagan Sridharan | 1c3865d | 2014-12-15 10:44:47 -0800 | [diff] [blame] | 1702 | #endif |
Peter Chen | aa919ef | 2019-08-26 15:10:55 -0400 | [diff] [blame] | 1703 | .suspend = configfs_composite_suspend, |
| 1704 | .resume = configfs_composite_resume, |
Andrzej Pietrasiewicz | 3a57187 | 2014-10-08 12:03:36 +0200 | [diff] [blame] | 1705 | |
Sebastian Andrzej Siewior | 88af8bb | 2012-12-23 21:10:24 +0100 | [diff] [blame] | 1706 | .max_speed = USB_SPEED_SUPER, |
| 1707 | .driver = { |
| 1708 | .owner = THIS_MODULE, |
| 1709 | .name = "configfs-gadget", |
| 1710 | }, |
Krzysztof Opasiak | f1bddbb | 2016-05-05 10:46:05 +0200 | [diff] [blame] | 1711 | .match_existing_only = 1, |
Sebastian Andrzej Siewior | 88af8bb | 2012-12-23 21:10:24 +0100 | [diff] [blame] | 1712 | }; |
| 1713 | |
Badhri Jagan Sridharan | 51af120 | 2015-07-14 15:46:11 -0700 | [diff] [blame] | 1714 | #ifdef CONFIG_USB_CONFIGFS_UEVENT |
| 1715 | static ssize_t state_show(struct device *pdev, struct device_attribute *attr, |
| 1716 | char *buf) |
| 1717 | { |
| 1718 | struct gadget_info *dev = dev_get_drvdata(pdev); |
| 1719 | struct usb_composite_dev *cdev; |
| 1720 | char *state = "DISCONNECTED"; |
| 1721 | unsigned long flags; |
| 1722 | |
| 1723 | if (!dev) |
| 1724 | goto out; |
| 1725 | |
| 1726 | cdev = &dev->cdev; |
| 1727 | |
| 1728 | if (!cdev) |
| 1729 | goto out; |
| 1730 | |
| 1731 | spin_lock_irqsave(&cdev->lock, flags); |
| 1732 | if (cdev->config) |
| 1733 | state = "CONFIGURED"; |
| 1734 | else if (dev->connected) |
| 1735 | state = "CONNECTED"; |
| 1736 | spin_unlock_irqrestore(&cdev->lock, flags); |
| 1737 | out: |
| 1738 | return sprintf(buf, "%s\n", state); |
| 1739 | } |
| 1740 | |
| 1741 | static DEVICE_ATTR(state, S_IRUGO, state_show, NULL); |
| 1742 | |
| 1743 | static struct device_attribute *android_usb_attributes[] = { |
| 1744 | &dev_attr_state, |
| 1745 | NULL |
| 1746 | }; |
Badhri Jagan Sridharan | 4b2c851 | 2015-08-09 15:12:50 -0700 | [diff] [blame] | 1747 | |
| 1748 | static int android_device_create(struct gadget_info *gi) |
| 1749 | { |
| 1750 | struct device_attribute **attrs; |
| 1751 | struct device_attribute *attr; |
Ajay Agarwal | fea56da | 2017-05-30 10:27:23 +0530 | [diff] [blame] | 1752 | char str[10]; |
Badhri Jagan Sridharan | 4b2c851 | 2015-08-09 15:12:50 -0700 | [diff] [blame] | 1753 | |
| 1754 | INIT_WORK(&gi->work, android_work); |
Ajay Agarwal | fea56da | 2017-05-30 10:27:23 +0530 | [diff] [blame] | 1755 | snprintf(str, sizeof(str), "android%d", gadget_index - 1); |
| 1756 | pr_debug("Creating android device %s\n", str); |
| 1757 | gi->dev = device_create(android_class, NULL, |
| 1758 | MKDEV(0, 0), NULL, str); |
| 1759 | if (IS_ERR(gi->dev)) |
| 1760 | return PTR_ERR(gi->dev); |
Badhri Jagan Sridharan | 4b2c851 | 2015-08-09 15:12:50 -0700 | [diff] [blame] | 1761 | |
Ajay Agarwal | fea56da | 2017-05-30 10:27:23 +0530 | [diff] [blame] | 1762 | dev_set_drvdata(gi->dev, gi); |
| 1763 | if (gadget_index == 1) |
| 1764 | android_device = gi->dev; |
Badhri Jagan Sridharan | 4b2c851 | 2015-08-09 15:12:50 -0700 | [diff] [blame] | 1765 | |
| 1766 | attrs = android_usb_attributes; |
| 1767 | while ((attr = *attrs++)) { |
| 1768 | int err; |
| 1769 | |
Ajay Agarwal | fea56da | 2017-05-30 10:27:23 +0530 | [diff] [blame] | 1770 | err = device_create_file(gi->dev, attr); |
Badhri Jagan Sridharan | 4b2c851 | 2015-08-09 15:12:50 -0700 | [diff] [blame] | 1771 | if (err) { |
Ajay Agarwal | fea56da | 2017-05-30 10:27:23 +0530 | [diff] [blame] | 1772 | device_destroy(gi->dev->class, |
| 1773 | gi->dev->devt); |
Badhri Jagan Sridharan | 4b2c851 | 2015-08-09 15:12:50 -0700 | [diff] [blame] | 1774 | return err; |
| 1775 | } |
| 1776 | } |
| 1777 | |
| 1778 | return 0; |
| 1779 | } |
| 1780 | |
Ajay Agarwal | fea56da | 2017-05-30 10:27:23 +0530 | [diff] [blame] | 1781 | static void android_device_destroy(struct device *dev) |
Badhri Jagan Sridharan | 4b2c851 | 2015-08-09 15:12:50 -0700 | [diff] [blame] | 1782 | { |
| 1783 | struct device_attribute **attrs; |
| 1784 | struct device_attribute *attr; |
| 1785 | |
| 1786 | attrs = android_usb_attributes; |
| 1787 | while ((attr = *attrs++)) |
Ajay Agarwal | fea56da | 2017-05-30 10:27:23 +0530 | [diff] [blame] | 1788 | device_remove_file(dev, attr); |
| 1789 | device_destroy(dev->class, dev->devt); |
Badhri Jagan Sridharan | 4b2c851 | 2015-08-09 15:12:50 -0700 | [diff] [blame] | 1790 | } |
| 1791 | #else |
| 1792 | static inline int android_device_create(struct gadget_info *gi) |
| 1793 | { |
| 1794 | return 0; |
| 1795 | } |
| 1796 | |
Ajay Agarwal | fea56da | 2017-05-30 10:27:23 +0530 | [diff] [blame] | 1797 | static inline void android_device_destroy(struct device *dev) |
Badhri Jagan Sridharan | 4b2c851 | 2015-08-09 15:12:50 -0700 | [diff] [blame] | 1798 | { |
| 1799 | } |
Badhri Jagan Sridharan | 51af120 | 2015-07-14 15:46:11 -0700 | [diff] [blame] | 1800 | #endif |
| 1801 | |
Sebastian Andrzej Siewior | 88af8bb | 2012-12-23 21:10:24 +0100 | [diff] [blame] | 1802 | static struct config_group *gadgets_make( |
| 1803 | struct config_group *group, |
| 1804 | const char *name) |
| 1805 | { |
| 1806 | struct gadget_info *gi; |
| 1807 | |
| 1808 | gi = kzalloc(sizeof(*gi), GFP_KERNEL); |
| 1809 | if (!gi) |
| 1810 | return ERR_PTR(-ENOMEM); |
| 1811 | |
Christoph Hellwig | 1ae1602 | 2016-02-26 11:02:14 +0100 | [diff] [blame] | 1812 | config_group_init_type_name(&gi->group, name, &gadget_root_type); |
Sebastian Andrzej Siewior | 88af8bb | 2012-12-23 21:10:24 +0100 | [diff] [blame] | 1813 | |
| 1814 | config_group_init_type_name(&gi->functions_group, "functions", |
| 1815 | &functions_type); |
Christoph Hellwig | 1ae1602 | 2016-02-26 11:02:14 +0100 | [diff] [blame] | 1816 | configfs_add_default_group(&gi->functions_group, &gi->group); |
| 1817 | |
Sebastian Andrzej Siewior | 88af8bb | 2012-12-23 21:10:24 +0100 | [diff] [blame] | 1818 | config_group_init_type_name(&gi->configs_group, "configs", |
| 1819 | &config_desc_type); |
Christoph Hellwig | 1ae1602 | 2016-02-26 11:02:14 +0100 | [diff] [blame] | 1820 | configfs_add_default_group(&gi->configs_group, &gi->group); |
| 1821 | |
Sebastian Andrzej Siewior | 88af8bb | 2012-12-23 21:10:24 +0100 | [diff] [blame] | 1822 | config_group_init_type_name(&gi->strings_group, "strings", |
| 1823 | &gadget_strings_strings_type); |
Christoph Hellwig | 1ae1602 | 2016-02-26 11:02:14 +0100 | [diff] [blame] | 1824 | configfs_add_default_group(&gi->strings_group, &gi->group); |
| 1825 | |
Andrzej Pietrasiewicz | 87213d3 | 2014-05-08 14:06:25 +0200 | [diff] [blame] | 1826 | config_group_init_type_name(&gi->os_desc_group, "os_desc", |
| 1827 | &os_desc_type); |
Christoph Hellwig | 1ae1602 | 2016-02-26 11:02:14 +0100 | [diff] [blame] | 1828 | configfs_add_default_group(&gi->os_desc_group, &gi->group); |
Sebastian Andrzej Siewior | 88af8bb | 2012-12-23 21:10:24 +0100 | [diff] [blame] | 1829 | |
| 1830 | gi->composite.bind = configfs_do_nothing; |
| 1831 | gi->composite.unbind = configfs_do_nothing; |
| 1832 | gi->composite.suspend = NULL; |
| 1833 | gi->composite.resume = NULL; |
| 1834 | gi->composite.max_speed = USB_SPEED_SUPER; |
| 1835 | |
jianzhou | 2de4359 | 2019-12-09 10:19:45 +0800 | [diff] [blame] | 1836 | spin_lock_init(&gi->spinlock); |
Sebastian Andrzej Siewior | 88af8bb | 2012-12-23 21:10:24 +0100 | [diff] [blame] | 1837 | mutex_init(&gi->lock); |
| 1838 | INIT_LIST_HEAD(&gi->string_list); |
| 1839 | INIT_LIST_HEAD(&gi->available_func); |
| 1840 | |
| 1841 | composite_init_dev(&gi->cdev); |
| 1842 | gi->cdev.desc.bLength = USB_DT_DEVICE_SIZE; |
| 1843 | gi->cdev.desc.bDescriptorType = USB_DT_DEVICE; |
| 1844 | gi->cdev.desc.bcdDevice = cpu_to_le16(get_default_bcdDevice()); |
| 1845 | |
| 1846 | gi->composite.gadget_driver = configfs_driver_template; |
| 1847 | |
| 1848 | gi->composite.gadget_driver.function = kstrdup(name, GFP_KERNEL); |
| 1849 | gi->composite.name = gi->composite.gadget_driver.function; |
| 1850 | |
Badhri Jagan Sridharan | 4b2c851 | 2015-08-09 15:12:50 -0700 | [diff] [blame] | 1851 | if (!gi->composite.gadget_driver.function) |
Badhri Jagan Sridharan | 2a387e5 | 2015-03-27 14:15:19 -0700 | [diff] [blame] | 1852 | goto err; |
Badhri Jagan Sridharan | 51af120 | 2015-07-14 15:46:11 -0700 | [diff] [blame] | 1853 | |
Ajay Agarwal | fea56da | 2017-05-30 10:27:23 +0530 | [diff] [blame] | 1854 | gadget_index++; |
| 1855 | pr_debug("Creating gadget index %d\n", gadget_index); |
Badhri Jagan Sridharan | 4b2c851 | 2015-08-09 15:12:50 -0700 | [diff] [blame] | 1856 | if (android_device_create(gi) < 0) |
| 1857 | goto err; |
Sebastian Andrzej Siewior | 88af8bb | 2012-12-23 21:10:24 +0100 | [diff] [blame] | 1858 | |
Sebastian Andrzej Siewior | 88af8bb | 2012-12-23 21:10:24 +0100 | [diff] [blame] | 1859 | return &gi->group; |
Badhri Jagan Sridharan | 51af120 | 2015-07-14 15:46:11 -0700 | [diff] [blame] | 1860 | |
Sebastian Andrzej Siewior | 88af8bb | 2012-12-23 21:10:24 +0100 | [diff] [blame] | 1861 | err: |
| 1862 | kfree(gi); |
| 1863 | return ERR_PTR(-ENOMEM); |
| 1864 | } |
| 1865 | |
| 1866 | static void gadgets_drop(struct config_group *group, struct config_item *item) |
| 1867 | { |
Ajay Agarwal | fea56da | 2017-05-30 10:27:23 +0530 | [diff] [blame] | 1868 | struct gadget_info *gi; |
| 1869 | |
| 1870 | gi = container_of(to_config_group(item), struct gadget_info, group); |
Sebastian Andrzej Siewior | 88af8bb | 2012-12-23 21:10:24 +0100 | [diff] [blame] | 1871 | config_item_put(item); |
Ajay Agarwal | fea56da | 2017-05-30 10:27:23 +0530 | [diff] [blame] | 1872 | if (gi->dev) { |
| 1873 | android_device_destroy(gi->dev); |
| 1874 | gi->dev = NULL; |
| 1875 | } |
Sebastian Andrzej Siewior | 88af8bb | 2012-12-23 21:10:24 +0100 | [diff] [blame] | 1876 | } |
| 1877 | |
| 1878 | static struct configfs_group_operations gadgets_ops = { |
| 1879 | .make_group = &gadgets_make, |
| 1880 | .drop_item = &gadgets_drop, |
| 1881 | }; |
| 1882 | |
| 1883 | static struct config_item_type gadgets_type = { |
| 1884 | .ct_group_ops = &gadgets_ops, |
| 1885 | .ct_owner = THIS_MODULE, |
| 1886 | }; |
| 1887 | |
| 1888 | static struct configfs_subsystem gadget_subsys = { |
| 1889 | .su_group = { |
| 1890 | .cg_item = { |
| 1891 | .ci_namebuf = "usb_gadget", |
| 1892 | .ci_type = &gadgets_type, |
| 1893 | }, |
| 1894 | }, |
| 1895 | .su_mutex = __MUTEX_INITIALIZER(gadget_subsys.su_mutex), |
| 1896 | }; |
| 1897 | |
Andrzej Pietrasiewicz | 092a4bd | 2013-09-26 14:38:15 +0200 | [diff] [blame] | 1898 | void unregister_gadget_item(struct config_item *item) |
| 1899 | { |
| 1900 | struct gadget_info *gi = to_gadget_info(item); |
| 1901 | |
Winter Wang | cee51c3 | 2016-07-27 10:03:19 +0800 | [diff] [blame] | 1902 | mutex_lock(&gi->lock); |
Andrzej Pietrasiewicz | 092a4bd | 2013-09-26 14:38:15 +0200 | [diff] [blame] | 1903 | unregister_gadget(gi); |
Winter Wang | cee51c3 | 2016-07-27 10:03:19 +0800 | [diff] [blame] | 1904 | mutex_unlock(&gi->lock); |
Andrzej Pietrasiewicz | 092a4bd | 2013-09-26 14:38:15 +0200 | [diff] [blame] | 1905 | } |
Felipe Balbi | 0700faa | 2014-04-01 13:19:32 -0500 | [diff] [blame] | 1906 | EXPORT_SYMBOL_GPL(unregister_gadget_item); |
Andrzej Pietrasiewicz | 092a4bd | 2013-09-26 14:38:15 +0200 | [diff] [blame] | 1907 | |
Sebastian Andrzej Siewior | 88af8bb | 2012-12-23 21:10:24 +0100 | [diff] [blame] | 1908 | static int __init gadget_cfs_init(void) |
| 1909 | { |
| 1910 | int ret; |
| 1911 | |
| 1912 | config_group_init(&gadget_subsys.su_group); |
| 1913 | |
| 1914 | ret = configfs_register_subsystem(&gadget_subsys); |
Badhri Jagan Sridharan | 1c3865d | 2014-12-15 10:44:47 -0800 | [diff] [blame] | 1915 | |
| 1916 | #ifdef CONFIG_USB_CONFIGFS_UEVENT |
| 1917 | android_class = class_create(THIS_MODULE, "android_usb"); |
| 1918 | if (IS_ERR(android_class)) |
| 1919 | return PTR_ERR(android_class); |
| 1920 | #endif |
| 1921 | |
Sebastian Andrzej Siewior | 88af8bb | 2012-12-23 21:10:24 +0100 | [diff] [blame] | 1922 | return ret; |
| 1923 | } |
| 1924 | module_init(gadget_cfs_init); |
| 1925 | |
| 1926 | static void __exit gadget_cfs_exit(void) |
| 1927 | { |
| 1928 | configfs_unregister_subsystem(&gadget_subsys); |
Badhri Jagan Sridharan | 2a387e5 | 2015-03-27 14:15:19 -0700 | [diff] [blame] | 1929 | #ifdef CONFIG_USB_CONFIGFS_UEVENT |
| 1930 | if (!IS_ERR(android_class)) |
| 1931 | class_destroy(android_class); |
| 1932 | #endif |
| 1933 | |
Sebastian Andrzej Siewior | 88af8bb | 2012-12-23 21:10:24 +0100 | [diff] [blame] | 1934 | } |
| 1935 | module_exit(gadget_cfs_exit); |